The "Seinfeld" diner.

Once the most densely populated place in the world, this island is now a ghost town.

An eatery in a shallow river where diners can enjoy their meal mere feet from the base of an artificial waterfall.

Narrow gorges and deep pools created by long-ago glaciers.

This unique bed and breakfast was first constructed during the 1800s by a Russian immigrant family.

Hundreds of glow-in-the-dark objects light up a museum in a historic zinc mine.

This upscale streetwear store is hidden behind a fake Snapple machine in the back of a deli.

The remains of the iconic train crash from the movie The Fugitive can still be found rusting along the Great Smoky Railroad.

Deceased nuns were placed on stone chairs to decompose, while the surviving nuns prayed near the lifeless bodies.

On the Oregon coast there is a natural hole that seems to be draining the sea.

One of the world's oldest and most massive living organisms is a grove of quaking aspens.

100-year-old shipwreck you can walk up to at low tide.

Giant busts of 42 U.S. presidents are sitting in a field in Virginia.

An acoustic anomaly with a mysterious cause.

The fanciest public restroom in New York City boasts fresh flowers, art, and a classical music soundtrack.

One of the largest private collections of cars manufactured by the short-lived Franklin Automobile Company.