Nine of the very few concrete ships ever made in the U.S. are beautifully decaying off a Virginia pier.

Across from a hotel parking lot, a Confederate spy rests under a large tombstone with her Union Veteran husband behind a copse of trees in a small, well-maintained cemetery.

Over 100 concrete munitions bunkers are all that remain of a Pennsylvanian village seized by the US government.

The oldest hotel in the world has been operated by the same family for over 1,300 years, even catering to samurai.

When construction began on this hotel, developers were surprised to find the ruins of an ancient civilization.

Dedicated to one of Spain’s most talented painters and also one of the least known.

The whole world in one water tank.

This groundbreaking 16th-century map is known as "America's birth certificate."

More than a century old, this trading post resides in the Navajo Nation.

Rich red almandine gemstones are waiting inside the volcanic rock strewn across this eastern Nevada hillside.

This rowhouse doubles as one of the most photographed spots in the nation's capital.

This recently rediscovered Civil War-era submarine was the first to ever sink an enemy ship.

One of the oldest living oak trees in the Southeast.

Not only is this nature preserve the largest protected freshwater island on the East Coast, but it’s also a stronghold of Gullah living.

A tiny red pebble marks what may be the quietest outdoor spot in the United States.

Luminaries of all stripes have sipped strong Greek coffee at this cafe since 1839.

These mystical miniature houses bring a touch of magic to the New Jersey woods.

A collision of human error and natural geothermal pressure created this rainbow-colored geologic wonder.

A melancholy guardian doubles as a judicious godmother to this small town cemetery.

An out-of-the-way wildlife haven with a rich and storied past of harboring thousands of fugitive slaves, or "Maroons" during the mid 1800s.

How did a massive marine arthropod find its way to landlocked Ohio?

Don't get it twisted: This is the oldest pretzel bakery in the United States.

There's a 12-foot-tall replica of the Washington Monument hidden under a manhole nearby.

In what is rumored to be an intentional act of spite, this memorial almost completely obscures the nearby grave of a senior officer.