This enormous World War II relic is one of the largest wooden structures in the world.

This mysterious series of teeny guerrilla installations sheds a whimsical light on street art in Oakland.

A large boulder marks the place where the island of Manhattan was purportedly "sold" to the Dutch.

A cemetery housing wild west legends in South Dakota.

Three hundred years of preserved Spanish colonial history in San Antonio.

The only road through the heart of Glacier 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.

An architect's childhood fantasy treehouse made real.

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

A graceful natural rock formation stands astride the point where the Gulf of California meets the Pacific Ocean.

This deserted Gold Rush town is home to a Masonic lodge that, strangely enough, still holds meetings.

This underfoot portrait is the work of a disgruntled painter inspired by a tragic poem.

Air Force Academy Chapel made of 100 identical tetrahedrons works to inspire those of all religions.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

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.

What was once a unique system of urban elevators is turning into a mechanical ruin.

Visiting dignitaries and Hollywood stars once stayed at this 1920s hotel, alongside ghosts that are said to haunt its corridors.

The large collection of pre-Columbian pottery might make you blush.

Lima’s Museum of Anthropology is lined with thousands of elongated human craniums.

This stone complex marks the urban center of a lost civilization.

If you’ve ever seen a picture of Machu Picchu, then you’ve seen a picture of Huayna Picchu—you just didn’t realize it.

Preserved Inca city and site of the last Inca stronghold against the Spanish conquistadors.