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

This tiny church near Sleepy Hollow contains Henri Matisse's last work, a rose window, and nine windows by Marc Chagall.

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

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

This beloved Baltimore spot features caged dolls, a giant Pez collection, and many, many mannequins.

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

A former mental hospital founded in the 1930s by a eugenicist who advocated for the forced sterilization of patients.

An FDR-era tuberculosis sanatorium has stood abandoned in the suburbs of the U.S. capital for over 30 years.

Ruins of a historic medical facility sits eerily by the water.

A miniature village lies nearly forgotten in the forest by the side of a major highway.

A religious-themed park filled with folk art to bring biblical stories to life that fell into disrepair and now being restored.

With some 500,000 books across five buildings, this bookstore is a reader's paradise.