Boost your cave cred (like street cred but for caves) by trying to squeeze through the alternate entrance to Deep Cave in Edwards County, Texas.
Note that the main entrance to the cave is in a 3 m sink just out of camera view, but you don't get any cave cred for strolling through the big entrance.
Deep Cave is still being explored and mapped in an ongoing survey project begun in 1999 and has over 5.3 km (3.3 miles) of passages and a depth of 78.3 m (257 ft).
Passages tend to alternate between tight crawls and spacious rooms with multiple leads.
The cave is highly decorated with crystalline helictites, stalactites, stalagmites, columns, flowstone, draperies, moonmilk, and popcorn, and many of these formations are either partially translucent or richly colorful.