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

This narrow coastline trail through the dense Kauai wilderness is among the most beautiful and dangerous in the world.

These ancient sacred grounds granted amnesty to those who managed to reach them.

Hide from the tourist hordes in these relatively unknown, and unguarded lava caves.

A fitting attraction for the corn capital of the world.

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

A sculpture made of 10 Cadillacs as a monument to the "Golden Age" of the American automobile.

This replica small town lets visitors take a stroll through the story of progress in the U.S. via thousands of Americana artifacts.

This roadside attraction has been serving out its fair share of hearty folklore and chaos since 1858.

This former coal gasification plant found a curious second life as a popular public park.

A wall of chewing gum moonlights as collective art.

A museum dedicated to the history and exploration of both popular music and science fiction.

A giant Troll lurks under one of Seattle's oldest bridges.

A walk through the historic city center, under the streets of Seattle.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

This historic hotel invented the chocolate brownie.

The only Bahá'í house of worship in North America and one of only a handful worldwide.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

Singapore's landscaping project is home to 18 incredible Supertrees.

This tiered waterfall is so pretty it may cause visitors to cry tears of their own.

Khmer Rouge's high security prison.

5,000 skulls in memorial to those killed by the Khmer Rouge.

A battle between nature and architecture in the Cambodian jungle.