Have tea in a cemetery with a dazzling view of Istanbul.

The eclectic home of a leading Turkish architect is a gorgeous piece of eye candy.

A gorgeous, Gaudí-esque stairway constructed in the city of Istanbul by a prominent Jewish family.

Legend says if you stick your thumb in the hole and it gets wet your wish will be granted.

A marvel of Byzantine engineering under the streets of Istanbul.

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

An Orthodox church built by the Royal Family for the Russian community exiled to the French Riviera.

These tombs were built into the side of a mountain so that ancient angels could reach the dead.

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

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

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

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

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

Eat the ultimate iteration of Portugal's most beloved pastry.

Hidden beneath a beautiful overlook you’ll find the history of the city depicted in comic strip format next to a pay toilet.

Perhaps the most spectacular grotto along the Algarve coastline.

The mysterious empty cupola behind the monumental arch points to an ancient prophecy of Delhi.

The 953 windows undoubtedly make this the world's most beautiful screened porch.

Climb a steep hill in 90 seconds on the second-oldest urban subway in the world.

This historic hotel preserves many treasures from its heyday hosting passengers on the Orient Express.

Taking the subway here means doing so over a bridge located in the middle of an estuary.

The last bastion of Roman presence north of the Alps looms over a German town.

This magenta statue commemorates the legendary marriage between a mermaid and the city's founder.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.