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

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

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

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

Catering to broken dolls for almost 200 years, this repair shop is now a charnel house of doll parts.

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

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

Dramatic sea stacks adorn the coast of this small village on the Adriatic coast.

The saddest little diner in New York.

The rotting skeleton of a shoreside fun fair that was destroyed by fire and storms still haunts the Brighton ocean view.

Nine limestone rock stacks on Australia's "Shipwreck Coast."

A miniature train-ride through Slovenia's largest cave system.

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

The fairy tale castle of the “fairy-tale king,” this was also the inspiration for Disney’s “Sleeping Beauty.”

A Gothic cathedral created from volcanic rocks.

Unusual building appears to be haphazardly built from randomly piled bricks.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

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

A gothic church spire sits atop this skyscraper, the tallest church in the world.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Construction of Barcelona’s iconic (but controversial) church was finally completed in 2026—a century after the death of its architect.