The sign for Carlsbad Caverns. more »

I'm not sure which building this was, but we were approaching somewhere here. It was eerily foggy. Here is a topographic map. The park buildings are at the top of the hill, at about 4400 ft. The cave is beneath the buildings. If you check the option to… more »

This is the auditorium at Carlsbad National Park. At dusk, they have a bat show, and thousands of Mexican free-tailed bats come barreling out of the cave entrance. Most of them head off to the right, far away from the seating area. Here is some park inf… more »

Here are some lovely rocks near the cave entrance. more »

Some green moss and a vine follow a trickle of water down the cave entrance. more »

I think there's a bat in the hole in the center of the photo. more »

Prickly pears above the cave entrance. more »

One of many holes created by slightly acidic water interacting with carbonate rock. more »

The cave entrance is home to a flock of chimney swifts. The green and white streaks are from their poop. more »