Black Hole Drop, Belize
If you are not afraid to stay away, try to visit Belize, you can do bungee jumping into Actun Loch Tunich cave, or Black Hole Drop, your guts will be tested there, you can also do rock climbing. To get there, you must travel on foot at the foot of the Maya mountains.
Then you will arrive in a cave, the cave itself is not dark, shrouded in a beautiful rainforest.