A unique collection of more than 250 rocks and minerals located on a university campus.

The only museum about the history of dentistry in Canada.

Fittingly, America's museum of architecture is itself a magnificently designed old building.

100 massive sculptures in the Hudson River Valley.

Decades after testing the polio vaccine on unwitting patients, this historic mental hospital sits in ruin.

This once luxurious Catskills resort is now a haunting ruin.

A winding, cliffside stretch of road overlooking the Delaware River.

This eerily well-preserved coal town was saved from destruction by a Sean Connery movie.

A blank headstone topped with a pile of pennies marks the final resting place of the infamous assassin.

Once a thriving business district, this former shopping area is now an urban ghost town in the heart of the city.

Once America's tallest structure, now a Baltimore landmark.

Baltimore's first skyscraper may be home to the inspiration behind pulp fiction's most celebrated bird.

One of the oldest anatomical theaters in the U.S. still in use was once the site of an infamous cadaver riot.

Few things look more out of place than the electric blue ponds in the reddish-brown desert of Utah.

A house carved into a rock in the 1940s.

The show's fictional Korean medical camp was created in the Santa Monica hills.

Instead of hoofing it up steep stairs, residents can hitch a ride on this private lift.

This forgotten Frank Lloyd Wright house is an architectural marvel at the end of a sleepy residential street.

This centerpiece of the Hollywood & Highland shopping center is a recreation of a long-lost movie set.

The decor of this Hollywood movie palace just barely predated the opening of King Tut's tomb.

A few iconic structures are all that remain of America’s first outdoor shopping mall.

This Chase branch is an homage to Old Hollywood.

The mall's looks were inspired by the cowboy extras who used to meet up—and cause real trouble—at this Hollywood hub.

Most famous work of one of Frank Lloyd Wright's sons.