A library of rare occult books in Los Angeles.

The beautiful baroque library of the Hapsburg empire.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

A submerged archeological park still holds the wonders of a Roman Sodom.

Started as a kitchen garden, now the second largest botanical garden in the world.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

An ancient capital city that dates back 3,000 years old and harbors many surprises.

Two stunning 17th-century libraries and a cabinet of curiosities.

This massive library holds what was once the largest book collection in the world.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

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

On Japan's Tashirojima Island, cats are king.

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

Said to be the only museum in the world dedicated to the most classic of all blooms, the rose.

An unfinished complex built for children from around the world sits abandoned on the Black Sea coastline.

Mysterious standing stone formations looks like a petrified forest.

Eastern Bloc nostalgia, anybody?

Outstanding, eerie frescoes and decorations fill this 19th-century monastery.

The remarkably well-preserved final resting place of a powerful ancient Thracian king.

This ancient theater, restored in the 20th century, lives on as a venue for dramatic and musical performances.

In a long-dry lake bed, these groups of massive stone pillars bear a striking resemblance to clumps of everyone's favorite fungi.

UNESCO-protected ancient burial ground.

A striking symbol of the Bulgarian capital.