400-year-old garden, restored to beauty.

The oldest residential street in Europe also features an optical illusion.

This large, circular tomb is the final resting place of the first emperor of Rome.

Cat art as far as the eye can see.

The sinister ruins of one of the worst dam failures of the 20th century lie in this astonishing alpine setting.

Housed in a memorial lighthouse, this museum relays the history of surfing, beginning with the antics of royal Hawaiian teenagers.

This centuries-old hotel hides a network of secret cellars and passages once used by smugglers.

The oldest candy store in the world has been selling traditional sweets since 1827.

The world-record holder for the longest bridge stretching continuously over water.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

Stones speckled along Harris Avenue reveal hidden nuggets of the past.

This stunning blue and gold room changed cities twice before becoming part of the Smithsonian.

This sprawling bookstore spans four floors and has more than a million books in stock.

A modern museum dedicated to the fairytales and dictionary work of the Brothers Grimm.

A hidden three-foot-wide house separates these two regal churches.

Flowers have mysteriously appeared on her effigy every day for the last 150 years.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

Deceased nuns were placed on stone chairs to decompose, while the surviving nuns prayed near the lifeless bodies.

When waves crash onto this section of beach, the rocks sing a song.

A collection of outdoor mystical statues paying homage to indigenous Australians and ecological stewardship.

The best preserved Paleochristian basilica in Rome hides a number of oddities and secrets.

Western Europe's only representation of a Roman goddess still in its original location sits in an unassuming park.

A bronze bust commemorates the heroism of the secret agents who led covert operations against the Nazis.

This Arcadian garden in the Pentland Hills boasts over 270 artworks by Scottish artist and poet, Ian Hamilton Finlay.