April 3, 2007: Carlsbad Caverns, New Mexico.

We have been through a few caves on our trip, but nothing compares to this place. First of all, it's huge. It takes 3 hours just to walk down and around the main part of the cavern. But mainly it's the size of the speleothems that sets these caverns apart. There are several stalactites, stalagmites, and columns that are over 30 feet tall. They've been growing at a rate of about 1mm every 100 years.