Belize is an awesome little country for caving. One of the most beautiful caves Belize has to offer is called the ATM cave(Actun Tunichil Muknal). I went on a small tour to this cave and it was about 3 miles deep. Some of the areas were quite huge, and if I had to guess upwards of 100 feet high. Just getting to this cave is an adventure in its own way, requiring a long 4 wheel drive, then a nice jungle hike for a few miles and then to top it off, just getting inside the cave requires a swim of about 100 feet, with the water being fairly deep. You will be traveling along, and often in this underground river all the way to the end. Mayan pottery is everywhere, and a special, somewhat morbid surprise at the very end, that I won't reveal. Some other caves are the cave tubing trip down the Cave's Branch River(very relaxing), Barton's Cave as well as some others. I also did a rappel down a very, very, very high cliff into a sinkhole. At the bottom of the sinkhole is a huge cave entrance. As I was rappelling, it started raining cats and dogs, and made it even more intense. Anyways, i highly recommend Belize for any thrill-seekers out there. Fun trip.