Canyon walls shrouded in ferns.

Built on the remains of one the Incas’ most important gathering spots, this square keeps the spirit of a fallen empire alive.

The stones of this Incan wall complex fit together so well you couldn't fit a piece of paper between some of them.

The tech giant built three enormous glass orbs in Seattle so employees could work inside a rainforest greenhouse.

A vision of beautiful Hindu architecture in the middle of the American South.

This charming stone church on the shore of Lake Tekapo is an icon in astrophotography.

The span is crooked and made from two older recycled bridges.

This former train station was once an important shipping depot for the regions farmers.

One of the most elaborate displays of Jellyfish is on display at the aquarium.

America's first federal monument.

The romance of early commercial flight still fills this Art Deco destination.

This lovely picnic spot featuring thunderous jet landings is an aircraft spotter’s dream.

Tour the sci-fi-esque reality of governmental disease management.

The Battle of Atlanta in 360 degrees, featuring a corpse that bears a striking resemblance to Clark Gable.

South Carolina's last remaining slavery auction house is now a museum devoted to its own tragic history.

A 90-acre park on former landfill that hosts an annual kite festival.

Every Sunday, this Thai temple in Berkeley serves a backyard brunch.

The Laureates here get something even more coveted than a Nobel Prize: free parking for life.

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

Ride the subways of yesteryear.

In this cobwebbed old operating theater, you can practically hear the screams of the unanesthetized patients.

The world's first underground farm is in a World War II bomb shelter beneath the streets of London.

Hidden beneath the streets of London is a secret subway that only carried mail.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.