Heron, whitewater rapids, and urban industrialism all add to the beauty of this concrete nature walk.

An eerie, abandoned military base engulfed by nature and graffiti is now home to a local park.

Despite violent work crews and massive delays this abandoned canal tunnel was built to last into the modern day.

The stone marker that Mason and Dixon placed at the eastern end of the famous north-south border they surveyed.

An isolated island home to one of the oldest English-speaking communities in the region and Maryland's state dessert.

This scenic Maryland park was the site of one of the worst prison camps of the Civil War.

This 1830s store is believed to be the site of Harriet Tubman's first stand.

Captain John Smith thought these cliffs were amazing in 1608 but sharks thought so 20 million years before him.

Politicians, bureaucrats, and military officers gathered in this field near the Capitol to settle their disputes with blood.

An intricately designed junk art house with four extravagant junk art cars hidden in the suburbs.

Live data is transmitted from the Atlantic coast to instantly recreate the ocean waves in this fountain at the NOAA headquarters.

One of the largest collections of Catalan literature and cultural materials outside of Spain, created by a community of 1960s expats.

A girls' boarding school inspired by the Chicago World's Fair, once abandoned, now restored to strange and scenic glory.

This suburban house is made of dirt, and almost sparked a revolution in home construction.

The ruins of this long-abandoned unsuccessful gold mine can still be found.

This ruined quarry once produced the distinctive red sandstone used for construction projects in Washington, D.C.

The land is home to swimming ponies and a legendary 18th-century treasure.

The remains of an idyllic small town built for the film 'Big Fish' still stand around a rundown main street.

One of the world's oldest fossil exhibits is on display in a beautiful antique "naturalienkabinett."

This series of underground chambers contains Europe's largest subterranean lake that is slowly drained each day.

Located right outside of Vienna, visitors can take in expansive views of an ethereal forest.

A spherical "micro-nation" in the heart of Vienna.

A 56-foot tall statue of the god of fire looks out over Birmingham, Alabama.

A natural history museum with an extensive collection of bird dioramas.