Its 1:30 if you stay with the group. They walk slow and stay to long in places. 45-60 minutes if you walk at a normal pace. Still worth it. Get discounts online too.
The two normal tours are about 90 minutes each. The "spelunking" adventures are up there in hours. I believe the average is 5 hours.
75min for the one we went on. The other tour could be longer and more hands on with rugged paths
About 45 mins. Its cool inside but once you get to the deepest part it gets a bit hot not alot. Take water or take cash because at the end there is a small stand with water and drinks plus snacks yet only accept cash. They do have a small restaurant to eat only junk food hotdogs and pizza stuff like that. I think they take cards there though.
Thanks! Your answer is awaiting moderation.