You left the BEST one out.

Unless "a college dorm" was on your list and I just happened to miss it? LOL

A lot of neighborhoods where all the houses are new have unlocked/open bare and model homes.  It still has that risk thrill, but easy if you do it upstairs; you'll have time to straighten up should anyone come in.  

In hs, I had a petsitting racket going, where I'd use clients' homes for sex.  

I've done 4 on your list.  

Wishlist:  
Sweden's Ice Hotel
Spaceship Earth ride  
Misery Islands (Preferably Little Misery)

A parking garage? Yes, a few times.
 A store dressing room? Yes.
 A public restroom? Yes.
 A Hospital? No.
 A boat, plane, hot air balloon? BJ on a plane, sex in a lavatory on a train in Italy.
 In front of a window, on a balcony or rooftop? yes. As a matter of fact, my first BJ was on the roof of a parking garage.
 A movie theatre, concert or sporting event? Mmmmm....concert would be fun.
 A wedding? No.
 In a church? In a church doorway...
 In a park, or on a golf course? Yes.
 Under a waterfall or in the ocean? Yes!! Some of my fondest memories!
 While driving? I've given drivers a BJ- many times.
   
 

-- Modified on 2/12/2016 1:19:35 PM

The elevator of my apartment building and the same building's roof deck.

a couple months ago had a fantastic bbbj in the parking garage of a beverly hills restaurant where i was taking my atf.

earlier in my life my wife and i snuck into a pool in the back of a mansion in la which my buddy was care taker of, and we f*cked in the pool.

wife & i also f*cked in a park in san francisco.  and my buddy and i got bbbj's from our so's (who later became our wives) as we all rode in the last seat on a greyhound bus traveling up the coast.

my bucket list is to do it in a bathroom in a restaurant sometime.

Ocean PCB Fl.    People watching thinking we are just playing around.   Lol
Under boat dock in water while others are sitting on dock.   They never knew.
BJ at drive in movie.   Best show I ever saw. Forgot the movie not the BJ
BJ job while driving.

a BJ in my office.. while I was at my desk..

I actually had an employee come in and talk to me while it was going on.. never had a clue..

College library study cubicle;
has desk & chair, Designed for one user, and privacy door is 3/4 length so passersby can glance to see if occupied.  
Arrive before closing to distract your GF's studying.  
Knock discretely & join her in cubicle. Caress & kiss her as she tries/pretends to finish reading assignment.  
Whisper to her to stand. Raise her skirt, slide down panties. Assume standing DS as she leans on desk.  
Fuck quietly but furiously to finish before library staff walks by to say "closing 5 mins"
2nd;
College dorm TV lounge, 220am;

Several of those listed

but the most unique was in a tent in the Semliki Wildlife Preserve in Uganda. This is only one of numerous places in East Africa where my wife and I had sex while listening to various noises from wild animals

MANY times in a car - parked by the lake (with public swimming), near the ball field at a local park, pulled over on a side street, behind the shopping mall, random parking lots...
Observation tower at the top of the hill in a stat park
Observation tower at the top of an abandoned ski area
In the bushes behind the Red Cross donation center
On a public beach in Rhode Island
On the deck of a friends vacant vacation cottage
In the ocean (salt water has zero lubricating properties)
On an open 18' ski boat on a river in PA

Many more places on the want to try list...

HJ while girl is cuming from my motorcycle vibration. Daty whilst ex was laying on a see doo. Lifeguard tower at nite. Greek on my office floor with a secretary. Midday in vacant office above my office. And of course.  The strangest place Ive ever had sex? Thatd be in the butt bob!

using a waist high grave stone to sit her on, while I plowed her in mish.

What can I say?  It was Halloween, and we both had too much to drink.

-- Modified on 2/12/2016 12:52:26 PM

By the way, about half the places you listed normally have video cameras.

See ya on the net

I will start with the one that got me in the most trouble.....

With Bf overnight at the Marine Barracks!  

* Where the Buffalo's run wild...With ex in Colorado pulled (back of truck) over to an open field of wild buffalo!

* Pre-race anthem...Inside of a Winston Cup hauler!

* Born to be Wild...On the back of a Motorcycle (FIV) while traveling down 1-95.

* Under an overpass...I was attending an outdoor concert which was part of a Harley bike fest. We had to leave early due to an approaching storm. It started raining and we pulled over to an underpass. We managed a quickie!

* Outdoor Concerts...Who hasn't done it there? especially while your favorite band is playing!

* Under the waterfalls...Costa Rica has some of the most romantic falls for lovers only!

* Memories at the marina...BF was captain of a charter boat, I loved waking up to him and the sounds that echoed within the marina...Pelicans, boat generators, Sail masts whipping in the wind or the metal clanging against them.

I'll stop there and read the others!

During a raging snowstorm ... God, I miss Colorado!

Back on summer break when I was in college..

I worked every summer in a professional (Union) summer stock theatre.. as an actor, techie.. etc..  
One set had a bed.. so one night after the show.. with one of my apprentices.. on the stage.. in front of an empty theatre.. with the curtain open ,cause that's how it was always left.. very strange.. it was her idea.. not mine.. she's still a FB friend.. I'll have to remind her about that adventure 45 years ago... sigh..

bj while driving my car (many times)
bj in the parking lot of a shopping mall
bj in the back seat of my car with her best friend driving through city traffic
bj in a movie theatre
bj in the ladies room of a restaurant with her sitting on the toilet
bj in the stairwell of a hotel
bj in the hallway of my apartment building
bj under my desk at work
sex on my desk at work
sex with her sitting on the bathroom sink
hj on the mezzanine level of a hotel at the railing overlooking the lobby
hj under the table in a restaurant (many times)
sex in the middle of a beach in broad daylight (cowgirl)
anal sex in the stairwell of a hotel in Paris while the maids were making up our room
sex on a bed in a hotel in Bologna with a large picture window overlooking the piazza while a guy in
  his office across the way was watching, and gave us a round of applause when we finished
 

-- Modified on 2/12/2016 7:38:06 PM

her hubbie was across the hall sleeping (maybe?), doors to both rooms open and just a 4 hall in between ..  more than once .... not the first time I've confessed this here ... lol

Store dressing room,  men's...

back of his Mercedes

 
In the limo!

 
And at a M&G party....the bathroom.....by the vanity...not near the toilet.

Yeah!

And at a zoo, were the two most unusual. On a boat is my favorite. I love the feeling the water rocking you, and the sound of the waves lapping at the hull.

- dated a very sexual real estate agent for 8 years...LOTS of empty houses

- the library stacks in college

- library conference rooms

- under a waterfall in Colorado

- church parking lot before a wedding (does that count for 2 of the OP's list?)

- golf course at night

- bj while driving

- hj while driving

- YMCA trampoline at night after it closed

Hmmm, it's been awhile, but I seem to recall a few...

Car sex with a GF back in my high school days.
On a beach and also on a balcony when I was vacationing in Montego Bay, Jamaica.

Hadn't seen my boyfriend in a week because I was in Florida on Spring Break.  We (the girls)  drove through a wicked snow storm to make it home to the Tipp to see our friends.  The smile on his face when I came in was devilish.  Young love is so much fun!  We kissed and we went out into the storm to where his car was.  Right there against the car in the parking lot with the snow falling.  Definitely most memorable,  unconventional and wicked hot!

In the sand dunes!  And it was even full moon!
Manu years ago a gf and I tried on a swing...no go.  It was very uncomfortable lol
Balcony, 38 floors up, overlooking Manhattan (at night)

D.

A parking garage- in a stairwell  
A store dressing room? A great BJ
A public restroom- BJ and FS. The FS was funny because people were knocking on the door and were shocked when we came out.
A Hospital- not yet. Maybe next time I am admitted
A boat, plane, hot air balloon- BJ on nearly empty flight years ago. Fights aren't empty any more.
In front of a window, on a balcony or rooftop- On a rooftop many times, in the elevator control room on the roof many times. On a balcony- a BJ. In front of a window- many times, BJ and FS.
A movie theatre, concert or sporting event BJ at movie theater. At a drive-in XXX rated movie theater- We are in the back seat and the car alarm went off and I couldn't figure out how to turn it off. Got dressed climbed out the window and went to the refreshment shack and called my dad who laughed his head off and told me he had no idea how to stop it. Happily it turned off while I was on my way back to the car, and we resumed our fun and it happened again- probably from the motion of the car from out sex. I started the car up to go, and the alarm turned off. I ate her pussy until she came, and she gave me a BJ. One of my weirdest dates.
A wedding? Nope
In a church? Nope
In a park, or on a golf course? Park many times. An empty golf course with my wife at the time- just went into the woods.
Under a waterfall or in the ocean? Nope
While driving? Only got a BJ while driving. I fingered a girl who was driving who pulled over while she came. On a busy street in NYC.
Other places:
In the stacks in school.
In a private room at school.
In a classroom at school that had a door we could lock. Only once did we do it before a class and we got kicked out of the room.
On the front porch of my date's house where she insisted on giving me a BJ.
On the floor of my parent's living room, a couple of times including once when they came home and practically caught us in the act.
At work many times, in my office, in the waiting room, on a desk. I had a blanket and pillow I kept in the office which was great for late night and weekends. Put a chair under the front door, and no worries.
At a hair salon in the back- she worked there and they had a waxing room- FS.
In same room with roommates who may or may not have been sleeping.
On almost every piece of furniture in our house.
Probably more, but can't remember now.

I sat on his lap wearing a dress
Also did 7 on that list, one of them (the hospital one) today lol

I love the dressing room! A favorite place was also a really nice steamroom.

...female restrooms at strip club (w partner/not w stripper,btw)-V Secrets dressing rooms!!!(12)-side stage during Santana concert in CLEVE-mutual under-table HJ/Finger at Signature Room during packed Sat Nite in Chi(really HOT!)..amazing fun on empty airbus flight to Portugal!!

No at all appealing to me, like the church or the hospital...lol