The only surviving prototype for Buckminster Fuller's house of the future.

This striking art museum holds an amazing series of curiosity cabinets.

The only arched bridge made of stone on the entire Mississippi River.

When flour explodes, it's not a pretty sight.

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.

The first declared National Monument in the United States.

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

A beautiful geyser under environmental threat.

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

The highest point in Washington state is a volcano covered in glaciers.

This massive mall has hundreds of shops, an amusement park, and a history of deadly amusement attractions.

This tiny square mile of Canadian sand was once considered the world's smallest desert.

Roadside collection of 65,000 signs.

The king of U.S. high points towers over every other peak on the continent.

Take shelter from Hawai'i's tropical heat under the massive canopy of largest Banyan tree on the island.

These picturesque Hawaiian falls are home to a rare species of fish that uses a special sucker to climb up cliffs.

The ancient latrines of the Greeks, in all their public glory.

The alleged house of the Virgin Mary is tucked away in a park and nature preserve on Mt. Koressos in Turkey and is holy to both Catholics and Muslims alike.

Giant marble phalluses on the sacred island of antiquity.

This African beach is home to thousands of rare mainland penguins that are known for their annoying voice.

A series of waterfalls so massive they straddle the border of Argentina and Brazil.

This striking, two-toned confluence of rivers is visible from space.

A beautiful opera house in the heart of Amazonia has recently restarted performances after a 90-year hiatus.