Venture into the hideout of one of Hong Kong's legendary pirates.

Climb to the top of the world's largest seated bronze Buddha.

Remnants of the most densely packed city in world history, that thrived on anarchy for 30 years.

In Hong Kong, a fairytale flower tunnel is hidden within the gardens of a public housing complex.

Teeming with illegal goods and services, this towering maze of vice is also a popular tourist accommodation.

A colossal floating restaurant built to look like a ancient Chinese imperial palace.

This hulking behemoth is actually five interconnected towers built in the 1960s.

A stately palace has been converted into the world's largest cannabis museum.

Barcelona's historic 19th-century sewers, whose foundations were laid in medieval times, are open to the public for exploring.

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

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

The 43-mile route crosses through six islands with gorgeous views of the Seto Inland Sea.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.

The barrel-made lookout from Shackleton's final ship is tucked away in the crypt of one of London's oldest churches.

These Japanese gardens are blankets of light for dark winter nights.

Countless stories attempt to explain Poland's mysterious J-shaped trees.

Terrifying derelict military hospital once housed a recuperating Hitler.

The ruined remains of the airport Claus von Stauffenberg departed in his failed attempt to kill Adolf Hitler.

A quaint Russian village in the middle of a German metropolis.

Gardens representing parts of Asia, Europe, and the Mid East are tucked away among the Soviet-style buildings in East Berlin.

A traditional U-Bahn station in Berlin gets a string of rather untraditional benches.

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

An eerie, derelict amusement park in Berlin.