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

The 28,000-year-old specimen is remarkably intact.

While most wind tunnels test scale models, the "Cave of Winds" was large enough for actual airplanes.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

This groundbreaking 16th-century map is known as "America's birth certificate."

This map, on display in the Library of Congress, and one of only seven known to exist, is the very first map of the United States.

The "lovely red Vega" of the legendary record-settling pilot.

This unique museum cafeteria showcases the history and regional diversity of African American cuisine.

There’s a hidden military meme engraved on the World War II Memorial.

The Lincoln Memorial has inspired many, even though a word on the inscription appears to be spelled incorrectly.

A model of a dinosaur that was named for Andrew Carnegie stands outside the museum that also bears his name.

The souvenir got the company’s founder out of a pretty pickle at the World’s Fair.

Pittsburgh’s largest and most detailed model train display began as one WWI veteran’s hobby.

10,500 square feet of pinball housed in former dollar store and home to the last playable "Thunderball."

Scotland's oldest medieval bridge is also among the last reminders of early medieval Aberdeen.

Recently revamped museum of Fijian history located within a gorgeous colonial-era garden.

An exhibit of endangered species confiscated from smugglers and passengers.

Frank Lloyd Wright’s most iconic home dangles over a Pennsylvania waterfall.

The last remnants of Fort Pitt also hold the distinction of being the oldest structure west of the Allegheny Mountains.

A piece of baseball history is preserved in a Pittsburgh parking lot.

This statue in Talcott, West Virginia, is an enduring symbol of American grit.

A retrofuturistic art installation in the Pittsburgh Airport.

Nothing says indulgence like a 1,500-pound chocolate castle.

To truly appreciate Detroit's landmark skyscraper, you have to step inside.