I'd say the ZOO!
This is on my 'to do' list in the very near future... like next month or thereabouts... we were going to go sooner but it was still winter so I suggested we wait until Spring when the weather is a little more stable and sunny and warm...
I think being in more open spaces will make you feel more comfortable... in an aquarium I know I'd feel a little closed in... I've had a pretty bad experience being in an enclosed space on acid with some VERY weird people around... it didn't make me have a bad trip, but my friends and I just felt VERY uncomfortable where we were and it was exhausting trying to ride it through until we could leave...
I would think being in an enclosed space with families, children etc might be a little too much if you're tripping... I would be able to look straight, but I think I'd start to feel uneasy with kids pushing you side to side to get up close to the glass etc... I don't mind sitting close & tight with friends and good company, but being pushed around crowds and strangers when on acid is NOT the nicest thing!
...at least at the zoo you can wander off to different areas for some more privacy and to chill out a bit...
I totally agree the aquarium would definitely be a wonderful place to trip too, but personally I'd feel much more comfortable being at the zoo... but whatever you choose to do, have fun and enjoy! :D
...OH! and one more thing... on acid - PETTING ZOO ...woah
