World's oldest and largest space launch facility, once a secret missile testing site.

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

A former major munitions plant that has been converted into a sprawling art space.

This simple stone memorial remembers a secret, Geneva Convention-defying interrogation base from WWII.

Rusting ships sit in a desert where a sea used to be.

These "50 Fortresses" have been unearthed in the ancient oasis of Khwarezm.

Former island in the Aral Sea used to be a top-secret Russian bio-weapons facility.

Once a bustling fishing port, this semi-ghost town is now more than 90 miles away from the shore.

A very classy 1920s-era bar right in Grand Central Station.

The semi-reclaimed ruins of this canal were once part of an ambitious plan to reroute the mighty potomac.

Headquarters of the legendary clairvoyant's readings, spiritual hospital, and massage school.

Rusty red sands line the shores of this Canadian Province.

These powerful, if squat, Canadian waterfalls flow in different directions depending on the time of day.

The first American department store, and home to the largest operating musical instrument in the world.

Golden and naked, the figure that was once the highest point in New York is all that remains of the second Madison Square Garden.