The Grand Canyon of Texas.

This frozen tunnel in central Alaska is both an engineering feat and a valuable climate classroom.

This statue inspired by Renoir's famous painting embodies the jovial spirit of Key West.

This lake in the Cascades lives up to its name, disappearing down a hole every spring.

A display of magnificent stained glass windows is the first exhibit of its kind.

This candy shop has been serving up sweets to the Louisville area since the 1850s.

Before Metro, Washington had a robust streetcar network—and you see the remains of this infrastructure if you know where to look.

This leafy estate is worth $18 million and is so grand it has two mailing addresses.

These towering spires and glowing walls are carefully crafted from hundreds of thousands of icicles.

Five acres of divinely inspired folk art.

The only home that Alexander Hamilton ever owned has a history almost as troubled as his own.

The man who was president for only one day and spent most of it asleep.

This stretch of beach along California's central coast is a busy highway for the largest seal in the northern hemisphere.

The famous bell was secreted away and hidden in a church in Allentown during the British occupation of Philadelphia.

The elevator that makes it possible to fly American flags in bulk over the U.S. Capitol

The unbelievably opulent home built for an infamous newspaperman.

About 80% of all U.S. avocados are descendants of Rudolph Hass's glorious tree.

One of the largest collections of wildlife art in the United States, built into the side of a cliff in rural Wyoming.

Statues of Ramona Quimby, Henry Huggins, and Ribsy the dog in the park where their adventures "really happened."

There’s a special club house at the top for the bell ringers.

The first presidential bomb shelter was located in an old vault under the Treasury, connected to the White House via tunnel.

Along the historic Mother Road is an old gas station with a secret counterfeiting past.

This Czar-funded, onion-domed, lavishly muraled Orthodox Church played a starring role in "The Deer Hunter."

35,000 grape hyacinths flow like water down a garden hill.