Preserved Inca city and site of the last Inca stronghold against the Spanish conquistadors.

Displaced highlanders would take shelter from the wet Scottish climate under the large walled bridge at Glasgow Central Station.

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

The famous winding walk at Chartres is surrounded in mystery and myth.

A Gothic cathedral created from volcanic rocks.

One of the most powerful religious centers in the Middle Ages, dubbed the founder of Western monasticism.

Captain America, Sub-Mariner, and the Human Torch were all born in this art deco Manhattan masterpiece.

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

It is against the law to obstruct the view from the top of this English burial mound.

Hindu temple of the dead home to hundreds of long-tailed macaques.

Where now stands a 42-story condominium tower of marble, glass and steel was once the central market of New York’s slave trade.

This abandoned subway station can still be seen on regular commuter trips.

A Dutch clog company in the town of Zaandam loves the wooden shoes so much it made a museum for them.

If you’ve ever seen a picture of Machu Picchu, then you’ve seen a picture of Huayna Picchu—you just didn’t realize it.

Yo, Adrian!

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

A precariously balanced rock perches on the edge of a cliff created tens of thousands of years ago by glacial erosion.

These 20-foot sculptures will help guide you from the local train station to the local sculpture garden.

Mysteriously stacked storefront paths give this medieval British town an iconic style like none other.

England's most notorious suicide spot.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

Red frames showcase remnants of one of New York's original subway stations.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

One of only two commuter aerial tramways in the United States.