The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

I-95's Tijuana-style celebration of kitsch at the Carolina border.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

A folk art mecca famous among outsider art fans.

A toxic ghost town sitting atop a massive coal fire.