This nine-story building is the oldest standing skyscraper in D.C.

Bison, America's national mammal, are staging a slow comeback in Ohio's prairie parkland.

A recreation of the doomed ocean liner in the middle of the Smoky Mountains.

This tiny, hurricane-resistant house in Galveston is one of the city's most notable architectural oddities.

As its grandiose name implies, this wooden dome is unsurpassed in size.

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

Ohio's 19th-century communist micro-society.

An obscure public service from the U.S. government that redeems burnt, moldy, and soiled old greenbacks.

Chicago's Navy Pier on Lake Michigan was a training hub for aircraft carrier pilots during WWII.

Fragments of architectural wonders from around the globe are embedded in the newspaper building's walls.

This funicular railway rumbles along for a mile up the nearly vertical face of Chattanooga’s Lookout Mountain.

The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

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

In a city crazy for seashells this museum educates and amazes visitors using the wonder of cast-off exoskeletons.

One of the only Florida forts to remain in the hands of the Union all through the Civil War still stands as a historic stronghold.

A bizarre roadside attraction and the first instance of miniature golf in the world.

Go take a picture with the inventor of the daguerreotype photographic process.

Washington's iconic carousel has a nice piece of Civil Rights history.

Constant erosion has created a surreal landscape of bleached and preserved fallen trees.

This futuristic airport terminal was abandoned for decades before reopening as a hotel—with a vintage plane of its own parked out back.

The birthplace of American international flight service has been turned into a celebrity's microbrewery.

One of Savannah's oldest and most haunted cemeteries, featuring graves desecrated by Sherman's Union Army.

The romance of early commercial flight still fills this Art Deco destination.

Just like the real 36th president of the United States, animatronic LBJ amuses visitors with jokes and stories.