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

This beautiful 16th-century necropolis marks an astonishing feat in heritage conservation.

Enormous sandstone towers loom within a Czech forest.

Partially submerged Buddha heads freckle Chicago’s neighborhoods.

A grand entrance to one of the world's smallest Chinatowns.

A 19th-century cabin built into a hollowed-out Sequoia tree.

Where an 11th-century flying monk crash landed after attempting to take to the skies.

Ride a boat through this magnificent underground world, which now doubles as a theater.

This mountain is one of the largest in Scotland but is better known for its hollow insides.

This under-visited temple is nestled within one of Shanghai's traditional shikumen-style residential blocks.

This unique eatery offers a taste of Estonia's "Onion Route."

These mountain hot springs have seen power struggles, doomed romances, and a generalissimo's attempted escape from mutiny.

Looking strangely like Rome's Colosseum, this unfinished tower has dominated the skyline for over 100 years.

A musical sanctuary that preserves gospel’s Golden Age is tucked inside a library at Baylor University.

A little piece of Oxford's overlooked industrial heritage.

The final resting place of the father of modern biological taxonomy.

This charming, hidden guild museum holds some 700 years of crossbow history.

An ornate private entrance to the Vienna subway built specifically for the emperor.

In 2013, historians discovered a hidden room devoted to the art of making royals' hot chocolate.

A museum dedicated to the decorative arts from the 16th through 19th centuries.

This dreamy street will transport you to wintertime in Victorian England.

In the middle of suburban Staten Island, a nearly 150-year-old bakery is preserving the art of a disappearing New York treat.

It was dubbed the "Garden of Plates" because it's covered in pieces of discarded dishes.

At the right time of day, sunlight floods through the roof of this cave and illuminates the small pavilion hidden within.