This small train ride offers stellar views of the Grand Garden Palace.

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

The best bagels in Berlin are tucked away in an independent bookstore.

An imperial church bombed to ruins during WWII now stands as a jagged memorial.

Berlin's old airport.

The reconstruction of this prominent building fulfilled a long-written command.

A stone marker and sculpture in the city of Riga stake a claim for the very first community Christmas tree.

A drawbridge named for a potentially intersex Polish national who fought alongside George Washington during the American Revolution, and an example of "Pulaski Red".

Once a ferry dock, radio transmitter, and now a new Greenpoint park.

A band of aerialists and circus performers putting on incredible shows in East Williamsburg.

How a century-old glass factory in Queens became a concert venue and arts center.

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

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

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

This home designed for chocolate magnate Antoni Amatller is an exquisite treasure-box of Catalan Modernism.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

An open-air "garden" of mural art that changes weekly.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

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 vast masterpiece of Moroccan architecture spreads across 20 acres.

Fortune tellers, snake charmers, poets, and storytellers all gather on this historic square in Morocco.

An awe-inspiring mosque in Morocco with one of the tallest minarets in the world.