To find the "unicorns of the deep" you've got to go downstairs.

These pretty kitties killed and ate as many as 135 railway workers.

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

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

The final resting place of American icon Buffalo Bill, and a museum that aids in telling his tale.

A memorial to the most decisive Native American victory of the Plains Indian War.

Cabins once lived in by Butch Cassidy and the Sundance Kid are featured at this Old West living history museum.

At the time of its completion, it was the tallest dam in the world.

One man's ambition created this psychedelic log home.

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

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

One of Hawaiʻi’s most notable historic petroglyph fields lies within a major resort.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

More than 2,000 species of tropical plants call this nature preserve and sanctuary home.

Babe Ruth and others planted saplings for a 1930s tourism campaign. The saplings grew as the area faded.

This legendary urban waterfall creates a dazzling display of rainbows.

This black shoreline is made up of exploded lava particles.

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

The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

Once the site of the Hawaiian monarchy, this building was originally designed as a palace.

A glass display case holds the document that ended the Second World War—which one person signed on the wrong line.

Race through the maze, get your name on the sign.

This blowhole is supposedly caused by a trapped monster.

Look closely and you’ll notice that the color changes a third of the way up the tower.