The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

The vast, legendary catacombs hold secrets much stranger than stacked bones.

See massive fossils that are over 200 million years old in northeastern Arizona.

This rural museum is home to more than 50 local desert reptiles and the world's largest snake bite kit collection.

A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.

An old saloon in the West filled with history, and according to some, a few dozen ghosts.

This Old West hotel, the longest in continuous operation in the state of Arizona, is claimed to be haunted.

This open-pit mine is now an abandoned symbol of Bisbee's copper-mining heritage.

Stairs often replace streets on the steep slopes of this old mining town.

A living snapshot of a different time in America is preserved and maintained by a community of volunteers.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

The largest and most well-preserved petroglyph site in the Verde Valley.

Ancient pueblos built into the base of a natural canyon wall.

This historic national park is covered in the stunning ruins of red rock pueblos.

This Native American settlement dates back to the Pueblo II period.

A monument to the one-armed geologist who led the first documented expeditions through the Grand Canyon.

This Yellowstone geyser may not shoot as high as the nearby Old Faithful, but it erupts for considerably longer.

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

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

A beautiful geyser under environmental threat.

Mysterious 500-year-old tapestries depict a unicorn hunt.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

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

At the tallest peak in Colorado, an electrifying mix of thin air, lightning, and rivalry.