Houses are tucked between, on, and underneath giant boulders.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

A garden oasis filled with flowers mentioned in the works of William Shakespeare.

Tenacious mummies survived dental problems, eternal entombment, and more than their fair share of devastating fires.

A monument to the love people have for their pets.

Gold Rush-era tombstones line the park's paths.

The oldest burial ground in the city, final resting place of city founders, Ohlone natives and murderers alike.

San Francisco's urban bison herd has persisted in the face of extinction, development, and disease.

Bring your own cardboard to the slippery slopes of concrete hidden in a neighborhood park.

A university observatory dome painted to resemble the beloved 'Star Wars' droid.

Trek into the depths of the cave where 17,000-year-old paintings exist alongside 400-year-old graffiti.

A French valley with forests so lush it was nicknamed "the Small Amazonia of the Pyrenees."

A tombstone on the grounds of the royal castle marks the burial site of a Swedish king's beloved dog.

Thousands of birds nest in the cliffs while arctic foxes prowl below.

An intricately carved Viking church overlooks a glistening fjord.

The etchings on this narrow channel between two islands bear witness to maritime travelers who have passed through since the Middle Ages.

This little gallery is devoted to one small town's passion for a very special cheese.

Crawling into this primordial cave may feel disconcertingly familiar.

These blingy, baubled skeletons lie in glass boxes inside a baroque Bavarian church.

Despite the groans of archaeologists, this astounding groups of Bronze Age petroglyphs have been painted red for tourists.

Keshwa chaca, among the last handwoven Incan bridges, crosses Apurimac Canyon in Peru.

Legend has this precariously placed rock was placed by giants. Science has another explanation.

Ever-growing collection of devils in art.