This hidden Art Nouveau courtyard is an opulent feast for the eyes.

Architectureal fantasy quarter of Rome.

This small 16th-century church in Athens is almost entirely surrounded by a modern building.

This ancient shrine has been rebuilt every 20 years since the eighth century.

Thirty architectural gems from the 19th- and early 20th-century Tokyo were restored and relocated to this space.

This isolated Japanese mountain village untouched by time showcases unique and stunning traditional architecture.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

This Hindu temple is an architectural marvel designed and built according to ancient Indian principles.

One of Canada's most incredible rare book collections holds hundreds of thousands of gorgeous tomes that the general public can touch.

The Avenue of Mausolea is a series of grand palatial tombs.

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

A former bastion of Rajput chivalry, this massive hill fort is the site of legend and tragedy.

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

England's steepest street has such a drastic incline that locals tie their parked cars to lampposts when it gets icy.

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world's largest coastal brick fortresses.

One of the most extreme deserts in the world, these snow-free valleys harbor life, despite the hostile environment.

Nimrod Polar Expedition base, and home to hundred-year-old frozen whisky.

The best place to send your postcards home from Antarctica.

An abandoned whaling station on an active volcano offers hot springs in Antarctica, surrounded by ruined giants of industry.

This Canadian island is a veritable garden of decay with countless abandoned structures dotting the landscape.

Once the most densely populated place in the world, this island is now a ghost town.

A tiny red pebble marks what may be the quietest outdoor spot in the United States.

Stroll through a wonderland of stupendous moss-covered trees.