A field of nothing but boulders which resembles a giant's gravel driveway.

Buildings that dynamite couldn't bring down were abandoned because of bathroom issues.

This demolished goliath of American industry once loomed over the depressed town it once made thrive.

A train station that was abandoned by the coal industry and was later converted into a cocktail bar.

The oldest surviving bridge in New York City, which reopened to pedestrians in 2015.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

A strangely angled West Village home is the only monument to an explosion that took the lives of three American revolutionaries.

The site of the deadly Triangle Shirtwaist Factory Fire.

The former sign of this immortal music venue is just that--undying.

Hear the quietest sound from across the dome.

The largest of London's subterranean rivers and once a mad, bad center of London life.

An unusual round church in London with a Templar past.

Ride the subways of yesteryear.

One of the largest public collection of historic armored and military vehicles in North America.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

Enter the cabin of a life-sized Hindenburg replica.

Two nations form a rare four-sided border at the peak of a mountain, philosophical questions result.

Celebrating the Eucharist, the day is a legal holiday in many parts of Germany.

The stones of this formerly witch-obsessed castle were used to build a church.

A small but immensely extravagant palace built by the "Night King."

Abandoned 19th century homes once occupied by naval officers, soon to be demolished.

A reproduction of earth's many biomes.

Step inside Lucy, the world's largest "elephant."

The rusting remains are visible sticking out of the waters of the Delaware Bay.