Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

An ancient Egyptian temple in the middle of Madrid, Spain.

This technological marvel is one of the world's first 3D-printed bridges.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

A lush indoor jungle fills this bustling Madrid transportation hub.

Secret North Korean passage discovered below the world's most dangerous border.

Enormous statue of the Emperor of the Mongols.

A beloved tribute to the Fab Four and the freedoms they inspired.

A huge communist-era propaganda monument and mural that offers stunning views of the Mongolian capital.

The humble home where the famous beat author lived briefly and wrote one of his most famous works.

Remarkably realistic Florida shoal bass "swim" inside this large globoid sculpture.

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

This geometric feat is a testament to the Incas' mesmerizing architectural abilities.

Suspended above the ground in a thicket of towering Georgia trees is a modern architectural wonder.

The childhood home of the Sultan of Swat is just a line drive away from Oriole Park at Camden Yards.

One person’s lost luggage is another person’s treasure.

These ancient ritual mounds are our best window into the culture of the ancient Mississippians.

A slanted tomb honors the faithful, furry companion of the Georgia Tech student body.

A statue honoring 44 continuous years of greeting passing ships.

This angular brutalist playground turns playtime into modern art time.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world’s largest coastal brick fortresses.

A monument celebrating the idea of reaching inaccessible places.

Visitors are welcome to enter this lush Key West sanctuary to entertain its plethora of rescued parrots.

"We Seceded Where Others Failed."