We went with our two daughters (11&13) on a Friday - both went on the recently opened zip-lines and ropes course ($23 per kid) and then we all went down into the caves for the standard tour ($83 total). 13 y/o says the zip line and ropes course, "...were so much fun! Not long to wait, the staff were nice and helpful, and they let us go through twice!" We got some great pictures of them since you can wander around underneath it all while they're doing it. We then went to the main building where you buy your tickets - line wasn't bad to purchase and we then waited about 30 minutes for our tour to depart. Plenty to keep you busy - I'd warned my kids already that mining for "gemstones" wasn't happening, but it's there if you want it. The start of the tour was informative, the elevator ride down no problem, and introduction to our guide just fine. Our guide (Andrea) spoke loud and clear and was very nice; maybe a few too many forced one-liners and the uber-annunciation was a bit funny, but all in all great job. The caves are truly an amazing site - although it's pretty obvious a lot of man-made intervention has taken place over the years. It's still a great introduction to caving and the wonders below the surface in a 1 1/2 hour walk and boat ride. We had brought a picnic lunch (knowing it would be a costly day) but there is a restaurant and snack stand available. Picnic tables are scattered here and there all with great views of the valley the site overlooks. Based on the building and trucks going in and out that day someone is investing some serious cash into this place - they seem to be doing the right thing based on the attendance. Bring a sweatshirt, sneakers, your wallet, a camera, and a "happy to be here" attitude and you'll count it as a day off of work well spent.