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

The final resting place of an unidentified revolutionary soldier sits behind a Virginia church.

A former major munitions plant that has been converted into a sprawling art space.

A massive, majestic mammal watches over pedestrians from his perch atop a former B.P.O.E. lodge.

A superbly preserved example of Georgian residential architecture that was once home to one of the founders of Alexandria, Virginia.

This colonial tavern played host to George Washington, Thomas Jefferson, and other famous early Americans.

Right next to departures—how convenient!

The narrowest house in America is seven feet of pure spite.

Why settle for barbecue chips when you can get actual barbecue?

In the days before house numbers, these colorful signs held clues about various buildings' purposes.

This large copper bolt represents the benchmark for measuring sea levels in most of Europe.

Birthplace of the "Cat in the Cradle" and a cluster of iconic, original windmills that let the Dutch tame the seas.

A cave 150 feet beneath Kansas City is the perfect climate for growing 10,000 delicate orchids.

An abandoned concrete jungle surrounded by a lush park.

Two hundred tons of pioneer artifacts were painstakingly recovered from a shipwreck at the bottom of the Missouri River.

This giant green head remembers one of America's jazz giants.

Tucked away between two 19th-century buildings, this small shop specializes in the macabre.

This recently restored timepiece has stood all around Kansas City.

The famous greeting card maker owns a collection of paintings by the famed surrealist.

This Kansas City studio was home to Walt Disney's first animation business.

This Italianate Villa-style castle is pretty to look at, just keep off the private property.

Four, 18-foot-tall badminton shuttlecocks lie scattered about the lawn of a Kansas City museum.

A beloved, quirky little fountain featuring a large frog spitting water at a naked boy.

The first car-centric shopping plaza in the U.S. brought a little bit of Spain to downtown Kansas City.