Spanning an elevation of 160 feet and containing 388 steps, this is Seattle's longest staircase.

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

An underexplored, 130-foot tropical waterfall that you will have all to yourself.

Visit a surreal landscape so otherworldly NASA actually used it to train the Apollo 17 crew.

The cell which saved the life of Ludger Sylbaris, "the man who lived through Doomsday."

This large stone off the coast of Martinique had a brief career in the Royal Navy.

The world's highest and most dangerous infinity pool lies at the precipice of Victoria Falls.

Giant aluminum tusks erected over the main thoroughfare to commemorate a visit by Queen Elizabeth II.

This colonial fort is an intriguing example of Renaissance military architecture.

Piran’s oldest square is laden with history and a beautiful 18th-century reservoir.

A whimsical bridge adorned with decorative dragons.

One of the best-preserved Roman amphitheaters is still used today, but for less brutal events.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

Built in 1512, the oldest cathedral in the Americas.

The final resting place of Christopher Columbus - or possibly someone else.

A focal point of the Cuban government, this city square features one of the most iconic images in the country.

A copy of the Statue of Liberty greets visitors to the birthplace of Auguste Bartholdi.

These paved rills bring freshwater into Altstadt and could spell wedding bells for whoever stumbles into the waters.

Located in a heritage building, this Mickey D's is missing its Golden Arches.

This artistic fountain display pays homage to this area's theatrical history.

This ferry carries passengers across the Rhine propelled by no engine or paddles but by the river's current.

An old hill fort covered in over 100,000 crosses is a symbol of Lithuanian nationalism and beliefs.

This former KGB building is now a museum memorializing the people who suffered during the Soviet regime.

During the Soviet era, the spire of this longstanding church was used as a radio transmission tower.