The biggest drug trafficking passage between Mexico and the U.S.

A dam that moonlights as a gigantic, brutalist waterslide.

A recreated Stonehenge stands in a country field, complete with Easter Island moai heads standing as sentries.

Abandoned railroad tunnel is home to a colony of three million Mexican free-tail bats.

Modern technology and live displays tell the story of the Pacific during WWII for the Internet generation.

One of the largest private collections of fossils in the world.

This prehistoric sinkhole lured exclusively male mammoths to their death, much to the delight of science.

A 22-foot stainless steel quilting needle pays tribute to a local connection to fiber arts.