Where the embers of the Big Bang were first detected.

An enormous overgrown greenhouse teeming with graffiti and wildlife.

This hospital fell into ruins after failing to act as the advocate for the mentally ill it was designed to be.

An abandoned military bunker that has been transformed into an artist's paradise.

The remains of a 19th century spring, and the site of an infamous unsolved murder.

Hidden in plain sight on the Hudson River is an abandoned train station where nature has taken over.

A storefront museum in Asbury Park honoring the Jersey Shore’s deep history of mystery—including the Jersey Devil.

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

Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

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

An astounding collection of medical specimens, including bits of President Lincoln.

An eerie, decaying ghost town destined to fade into the forest.

Crammed into a Baltimore row house is an oddities shop that sells everything from skulls to dead insects.

This free, take-a-book shop seems like a trick but isn't.

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."

The haunting "Hell House Altar" is one of the few remnants of an abandoned college that has been a magnet for local legends.

Opened in 1956, the first modern indoor shopping mall in the world was inspired by the shopping arcades found in European cities.

One of the world's premier laboratories for hydraulic engineering research takes full advantage of the water's power.

1887 era Russian Orthodox church in Minneapolis.

A futuristic climate change study is nestled deep within this public land.

Home to the Amorphophallus titanum "Corpse Flower," which is among the largest flowers in the world and also smells powerfully of rotting flesh when in bloom.

An unusual assortment of art, furniture, and other curiosities.

A museum within a museum, devoted to history's most questionable medical devices.

Chef Lawrence West serves up Indian tacos, wojapi, and other Lakota dishes at the brick-and-mortar incarnation of his popular food truck.