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

Rumors of the occult haunt this upscale 1920s hotel.

This monument is dedicated to a young boy who survived a disaster that forced Edinburgh to reevaluate its building codes.

An abandoned church gets a second life as a massive beer hall and event space.

This 14th-century temple is also known as the "Temple of the Golden Pavilion" for its gorgeous gilded reliquary hall.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

Ring the bell to enter a bar that looks equal parts museum and old curiosity shop.

This charming candle shop has been in business since 1789.

The world's oldest bookshop still in operation.

An enormous pair of straw sandals woven in the traditional way—to keep demons at bay.

Nikola Tesla's former home contains an homage hidden from plain sight.

One of the foremost Sherlock Holmes collections is hidden away at a Toronto library.

A botanically themed auditorium blooms within the world’s last operating double-decker theater.

One of Canada's most incredible rare book collections holds hundreds of thousands of gorgeous tomes that the general public can touch.

A book collector's dream, this Toronto bookstore has the world's first "Biblio-Mat," a random book vending machine.

The remains of the vast manor that once belonged to Lord Kira, villain in the 47 Ronin story, is now a shrine dedicated to the incident.

This subterranean oyster house has been the pearl of Grand Central Station since 1913.

The ruins of the "place of the cloud snake" sit in the middle of an urban environment.

This hidden Sufi cemetery is a spiritual monument for India's third gender community.

Nestled among the artifacts of the National Crafts Museum, this hidden gem offers hard-to-find regional foods from all over India.

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

Time has stopped at the house where Gandhi died.

A startling, centuries-old subterranean marvel hides in plain sight.

There is only one place in the world where the corners of four nations come together.