A dilapidated dock tells the story of Titanic's missed arrival.

A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.

The remains of a failed attempt at medieval nerdery are hidden deep in the woods of Virginia.

This scenic Maryland park was the site of one of the worst prison camps of the Civil War.

Beating out all other concrete competitors, this massive garden feature's pointy hat has earned it a world record.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

Named after a bandit and the star of several Hollywood prehistoric landscapes, these sandstone formations are a historical part of the Los Angeles natural landscape.

Beneath the surface, something slithers. And if you find it, prepare to be slimed and glowing.

Seemingly grown on some other world, these New Mexico rock formations look like a disused science fiction set.

This Florida sinkhole hides a rainforest-like micro-environment in its depths.

Island ghost town detailing Flagler's folly in building the Overseas Railroad.

An underwater city for the dead.

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

A mysterious castle built as a monument to lost love.

The culprit who accidentally lit this 3,500-year-old tree on fire stated "I can't believe I burned down a tree older than Jesus."

Just below the surface, shrimp are producing temperatures hotter than the sun.

Meet manatees face-to-face at this zoo for native species.

Welcome to old Florida, where a 1940s mermaid show is still enchanting visitors.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

Reclaimed by nature, the ruins of Doodletown, New York are remnants of a town consumed by a state park.

Manatees congregate around a power plant's discharge canal where the water is especially warm.

Possibly the most beautiful carillon in the world, set atop Iron Mountain in Florida.

The oldest bridge in South Carolina may have been designed by the same man who created the Washington Monument.

This amazing pedestrian suspension bridge in the Swiss Alps would give Indiana Jones nightmares.