It's a pretty creepy lock-up.

A luxurious 1880s hotel with its fair share of Tiffany stained glass, Edison electricity, and of course, ghosts.

Come for the speed, leave in love with the desert.

Legend has it the commander of the defenders drew a fateful line in the dirt with his sword just before the final battle.

A 131-year-old wunderkammer of Texas history.

Modeled after a famous church in Vienna, Austria—but in Helena, Montana.

Berkeley Hot Springs presents to you "the only outdoor monument to presidential bathing."

This Delaware River bridge is emblazoned with a catty slogan from a more prosperous time.

This extraordinary Depression-era expenditure was modeled after a postcard of a Mediterranean hotel.

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

The Hudson River School comes alive at this palatial estate.

One man's swirling six-acre monument of stone.

A towering monument in Spain has proven to be more labor-intensive than initially planned.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

A museum dedicated to the legacy of Bob Moog and his pioneering synthesizers.

A wunderkammer hidden on the top floor of the Hartford statehouse.

The Dover International Speedway is home to a towering, concrete-skinned, racecar-hungry behemoth.

A desiccated merman and a walrus penis bone are among the oddities in this eclectic collection of shipwreck treasures.

These unusual rooms on wheels are holdovers from the 1960s.

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

The graveyard holding the remains of George Washington's slaves was forgotten for nearly 200 years.

Thomas Jefferson's estate is home to hundreds of varieties of historic fruits and vegetables.

At 207 feet, one of the world's longest continuous escalators.

The ruins of this Thomas-Jefferson-designed mansion have been left to crumble since the Christmas Day they burnt down.