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

San Diego's most historic and haunted home.

One of the last few places in Manhattan that employed a pneumatic systemic keeps it on display.

This massive redwood tree has a hole in the base big enough to drive through.

The final resting place of a space program monolith.

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

After starting as a whimsical tourist attraction that eventually found its way to ruin, these renovated canals offer a lush and exotic locale on the Pacific Coast.

Aqueducts have dramatically changed this old lake, now home to tufa towers and its very own species of tiny brine shrimp.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

A beautiful geyser under environmental threat.

The first declared National Monument in the United States.

Towering basalt columns, a creation of fire and ice.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

The rocks in this arid basin leave trails of movement behind them.

An old vending machine serves up unpredictable beverages from its seemingly magical insides.

The abandoned zoo enclosures offer a perfect place to experience the other side of the bars.

One of Ireland's most infamous prisons for rebels including men, women and children.

Oldest building in California still in use.

One of the few remaining carousels built by master amusement park carver Charles I.D. Looff.

A giant donut stands as a popular symbol of Los Angeles iconography.

A sign at the end of the Santa Monica Pier marks the traditional end of the legendary American highway.

Megachurch turned Catholic church comprised of 10,000 glass panes.