The capital of the Cayman Islands is a center of offshore banking, but gets battered by blistering hurricanes.

Though strikingly beautiful, Seattle's other railway station is now largely forgotten.

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

A rare chance to get up close and personal with a 13-mile ribbon of ice near downtown Juneau.

Breathtakingly blue walls shimmer inside the "Glacier Behind the Town."

An ancient iron pillar in Delhi that seems to be rustproof.

The place of worship for Zoroastrians, Mumbai's Parsi fire temples use fire and ash for purification.

This noble mash-up in eastern Luxembourg is part Medieval, part Renaissance, all castle.

Once the local rulers had gone these enchanting ruins housed common folk in an almost real life fairy tale.

Museum celebrating the ocean, with the largest wunderkammer dedicated to sea exploration.

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

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

This cemetery features modernist statues as strange as its name.

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

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Over 100 towers were built in Bologna during the Middle Ages, but only 22 survive.

Milan's duomo is covered in beautiful carving including a curious "dinosaur-like" beast.

Once a state-of-the-art tuberculosis treatment spa, these ruins are now ruled by paintball players.

An abandoned Byzantine fortress and notorious prison.

This no man's land slicing through the island is strewn with abandoned relics of another time.

An ancient necropolis of magnificent tombs.

This 700-year-old Cyprus castle is the birthplace of the world's oldest wine, said to be toasted by Richard the Lionheart at his wedding.

The ancient mosaics here are considered among the finest in the world, and serve as a stunning record of Greco-Roman daily life.

Planned as the world’s first zero-carbon city, it had lofty ideals—but is only 5 percent completed and aiming for 50 percent carbon-neutral.