A cave in southern Italy adorned with thousand-year-old Biblical frescoes existed in obscurity until fairly recently.

This public toilet built in the famous Amsterdam School architectural style is a Dutch national monument.

Natural history museum displaying a famous taxidermied St. Bernard.

The bears of Bern have been a city highlight for over 500 years.

A 6th-century stone lies at the site of the mythical battle waged between King Arthur and his nemesis Mordred.

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

This palatial spiral staircase was so unusual the name "snail" was given to the noble family who built it.

Ernest Hemingway was the first to sign this colorful wall covered in thousands of celebrity signatures.

A labyrinth of ancient tunnels hidden below the city holds the ruins of 2,500 years of history.

A once-thriving hotel in the Swiss Alps couldn't compete with climate change.

A public urinal so pretty, it was declared a national monument.

The stunning interior of this Gothic church is covered in ornate gold details.

The most southerly spot on New Zealand's South Island is home to surreally shaped, permanently mangled trees.

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.

A cluster of granite granaries perched on stilts.

A remarkably well preserved tower dating all the way back to the Iron Age.

A curious little museum dedicated to the furry feline in the cat haven that is Old Town Kotor.

A solitary tree has grown up all alone on Lake Wānaka, backdropped by the beautiful Southern Alps.

A perfect turquoise lake colored with glacier dust.

The glacier tucked within a New Zealand rainforest.

Abandoned medieval hill town.

Five candy-colored villages on the Italian Riviera.

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.