Old ships and machinery fill a historic harbor in the city that's home to Europe's largest port.

Iconic rock formations that allow for exploration during high or low tide.

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

Cliffs that hold fossils, including the earliest known reptile, dating back more than 300 million years.

Home of the world's smallest dinosaur footprints.

An oasis of shade and color amidst the bustle of the old city.

Concentrated around the Dead Sea, these surprising canyons are filled with coursing water, fish, and even crabs.

A ghost village sits atop a mountain within Jordan’s largest biosphere reserve.

The most gigantic, swoony, intimidating trio of fingers in all of antiquity.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

This large sand dune in the Netherlands is home to wind-whipped trees with "floating" roots.

An awe-inspiring giant blue whale jaw bone stands in the center of this Dutch island.

Home to the world's oldest functioning orrery.

The world's largest reflecting pool is just two centimeters deep.

This tiny river island switches sovereignty every six months as part of a rare, centuries-old agreement.

Elaborate tile work in this railway station tells the story of Portugal.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

Considered the birthplace of the Copper Age and Bronze Age, the river is tinted red from 5,000 years of mining.

Single runway interrupted by a busy road that cuts across its middle.

Three bridges and one giant canyon make up this fantastic Spanish settlement.