Rome's semi-secret peephole vista is also a former Crusader stronghold.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

Some Moscow residents once claimed the bizarre, contorted mass of metal on top of the building was used to manipulate minds.

Legends of time travel and magical woodland creatures bolster the natural charm of this verdant sanctuary in the midst of Moscow.

A former steam-powered mill from the 1800s is now an industrial park with a giant steel dragon slide.

The largest Art Nouveau complex in the world is a Barcelona hospital with a 600-year-long history.

This former Baroque palace on the historic Calle Montcada is a rare architectural gem and was once the meeting place of an aristocratic scholarly society.

An unusual stroll through gentlemen's erotica demonstrates that pornography is timeless.

These secluded and abandoned anti-aircraft defenses have become one the most scenic viewpoints in Barcelona.

A beautiful but toxic fountain of mercury.

This semi-secret storybook hedge maze is also the oldest garden in the city.

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

Exotic, erotic, and esoteric, one artist's live-in Bali gallery brings a splash of color and madness to its surroundings.

Think you have a tough job? Try carrying 200 kilos through a cloud of sulfur down the side of a volcano.

This Indonesian village was revitalized by a vibrant rainbow paint job.

Sacred waters rescued from the wrath of a volcano.

This tiny lake temple dedicated to a water goddess seems to float on the surface.

Bali's remote "gateway to heaven" is one of the most sacred places on the island.

Hindu temple of the dead home to hundreds of long-tailed macaques.

Isolated atop this Balinese sea crag is a lovely Hindu temple that is said to be guarded by sea snakes.

Is there such thing as too many fruit bats? Not anymore.

An abandoned jewel of a ballroom on the top floor of Australia’s busiest rail station echoes with the sounds of a bygone era.

Though considered an eyesore by some, this boxy Brutalist high-rise plays a significant role in Sydney's past.

An ancient engraving by the Cammeraygal people was uncovered in the transformation of a North Sydney industrial site.