This stately clock was gifted from China's last imperial government to the people of Mexico.

This old-school café is famous for serving coffee, chilaquiles, and the Cuban Revolution.

Many people don't realize there’s a lot going on in—and below—the world’s tallest triumphal arch.

The Mexican painter Diego Rivera created this unusual museum to display his collection of pre-Hispanic artifacts.

These unusual paintings give thanks to the saints and deities who granted people favors and miracles.

A bullet-scarred monastery chronicles Mexico's turbulent history of foreign invasions.

The F1 Mexican Grand Prix circuit goes right through the middle of this old baseball stadium.

In 1975, a forestry worker in Arizona claimed to have been abducted by a UFO.

This Masonic lodge was the first major private building to be constructed in Washington, D.C. after the Civil War.

Once home to the largest photo service in the United States.

An unprepossessing storage reservoir in southern Utah has a checkered past.

A tunnel that brings more than a century of history to life from the deepest parts of the Niagara Gorge.

One of the oldest surviving bars in the United States, located at the site of the last skirmish of the American Revolution.

The final resting place of a baseball legend who was better known for his behavior off the field.

Before TV meteorologists, there were weather kiosks. This may be the last one in the United States.

This house was once the location of Frelinghuysen University.

This former shopping outlet is now adorned with beautiful graffiti and murals.

The world’s largest concentrated solar plant generates as many problems as megawatts.

This giant temperature attraction created some giant electric bills.

The "Fun Spot of the Desert" is now a haunting ruin, and a reminder that putting a water park in a desert is a bad idea.

Like a kitschy mirage in the Mojave, this eatery serves up classic 50s-style diner meals and a dinosaur sculpture garden.

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

This sinkhole in the Arizona desert is filled with carbonated, arsenic-rich water

This site honors the end of a 100-year boundary dispute between the United States and Mexico—all started by a river's shifting course.