A fairytale island floats in the middle of Italy's little-known Lake Orta.

The Sighignola summit on the Swiss border offers views so breathtaking it's been named one of the most beautiful places in Italy.

One of the most well-preserved castles in Italy also contains a rare medieval example of a port fortification.

A geothermal paradise with bubbling mud pools and bright blue hot springs.

A local train station entrance hall doubles as a sanctuary for barn swallows.

This coffee shop lies hidden beneath a historic church.

The world's first underground farm is in a World War II bomb shelter beneath the streets of London.

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

A cluttered and astounding collection of antiquities and curiosities.

This hidden green space is the city's second largest conservatory.

This 1920s Dutch barge is now a floating bookstore.

Breathtaking and huge 430 year old maps of Italy.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

Follow the original medieval paths that wind through this intriguing section of the city.

A 1,215-foot tunnel transports pedestrians beneath the River Thames.

A lush green oasis in the middle of Chicago.

Sniff the Titan Arum's rotting flesh.

The sound of swaying stalks in this stunning grove has been named a governmentally recognized sound.

Designed by Buckminster Fuller, this relic of the 67 Expo survived fire and ice.

Iceland's largest lagoon is home to stunning multi-colored icebergs.

10,000 flowered plants bloom in the City of Roses.

A semi-scholarly approach to sex.

When ecosystems collide in the arid Southwest.