This Transylvanian church has changed its denomination four times.

A fire once nearly devoured this gorgeous 14th-century Gothic cathedral.

The European towns of Brașov and Râșnov each have proud signs reminiscent of the Hollywood sign.

Romania's only crater lake with water as pure as if distilled.

Something's watching you.

This snug medieval lane is one of the narrowest streets in the world.

A cablecar-station-turned-revolving restaurant with 360-degree views of the Swiss skyline.

The last standing example of an ancient district's teatime tradition.

Ancient barriers wrap around what was once an important stop along the Silk Road.

The castle still holds traces of the abandoned Roman fort it was built atop.

Behind medieval walls in a corner of bustling Palermo is a breathtaking former mosque once inhabited by a wolf-taming hermit.

This street has over a half-dozen names, all at once.

It is said that each of the white stones in the red facade of this medieval house represents the head of a murdered Swedish noble.

This triumphal 16th-century arched gateway leads to the oldest street in Palermo.

This abandoned beacon is moving closer and closer to the sea.

The spot where the fascist dictator made some of his most famous speeches including declaring war on Britain and France.

This architecturally eclectic fortress witnessed centuries of bloody turmoil, including the massacre of its ruling clan.

The largest crypt ever constructed in France was built in the 11th century on an ancient Druid sacred site.

Hidden behind a wall, Spanish nuns distribute their signature sweets on a revolving tray.

A hidden church in a hidden courtyard tells the story of the Miracle of Amsterdam.

A spectacular rainbow of stained glass makes the "Pink Mosque" one of the most beautiful in Iran.

A simple plaque on the facade is the only reminder that the treaty ending the American Revolution was signed inside.

This Arabesque Italian castle was built with a primitive, if ingenious, air-conditioning system.

Every inch of this chapel is covered in craftsmanship from across the world.