From economic backbone of a community to deadly diving hole, these former stone quarries are now a park for rock climbers and graffiti artists.

Downtown Minneapolis mixed art and function by turning some of their sewer covers into works of art.

The only arched bridge made of stone on the entire Mississippi River.

When flour explodes, it's not a pretty sight.

One of the most scenic falls in Massachusetts has a history of death and grim legend.

Site of a famous 19th-century transcendentalist utopian community, now abandoned.

The sweetest graveyard in the world is filled with headstones for dearly de-pinted ice cream flavors.

Hide from the tourist hordes in these relatively unknown, and unguarded lava caves.

One of the largest free-standing structures ever built, this dirigible hangar is now simply a giant skeleton.

A portion of the old Pirates stadium over which a defining home run once flew still stands even after the rest of the stadium was torn down.

Hundreds of protractors affixed to surfaces all over the city.

Once the tallest building in the world and the site of "the highest dinner ever held in New York" this building now holds the most expensive penthouse in the city.

Discovered by cows, these upstate New York show caves are presented with a healthy dose of psychedelic folk art.

Known as one of the most climbed mountains in the world, this barren peak is permanently bald thanks to an anti-wolf fire.

This impressive Boston holy house is the American mecca for Christian scientists.

Unlike other abandoned asylums this empty institution welcomes visitors, just don't go in the buildings.

Once a strategically imperative naval base, portions of this Bermuda dock complex now serve cruise ships.

The picturesque birthplace of Icelandic democracy is drenched in the blood of its brutal past.

The former site of an all-but-forgotten colonial landmark is now remembered by an often overlooked bas relief.

Ironically this massive termite is the mascot for a company that is acclaimed for killing his kind.

This monument on Breed's Hill proves that one of the most famous battles of the Revolutionary War is misnamed.

One part local history, 99 parts gruesome haunted house.

This luxury shopping lane has been protected by its own tiny police force for over a century.

A collection of housewares from recent Irish history adjoined by a tower from ancient Irish history.