This peaceful Sikh gurudwara serves around 50,000 free meals every day within its gilded walls.

More than half of this Indian palace is drowned but it looks all the more spectacular for it.

This castle was once considered as an option for the Royal Family's alternate residence, but you may know it better from the 'X-Men' movie.

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

The world's most active stratovolcano is almost always erupting.

A mysterious ancient elephant said to possess magic powers is now the symbol of a Sicilian city.

One of the few standing Roman lighthouses and a labyrinth of tunnels are a couple of the secrets at this historic castle.

A peculiar trapezoidal building covered with wonderful humorous reliefs.

This cheeky statue of a man defecating gold coins graces the facade of a medieval guildhall.

An abandoned Byzantine fortress and notorious prison.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

Monasteries on rock pillars, once accessible only by frayed ropes.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

The risqué mixed-media sculptures are supposedly a metaphor for Czech politics.

The former Nazi Germany concentration camp stands as a museum to remember this dark chapter in European history.

This centuries-old wooden wonder was built in less than a year and is one of Europe's largest timber-framed churches.

A massively oversized measuring tape sculpture sits inside a hidden yard.

Massive puppet-automaton machines created by French artist collective Machines de l’Ile.

The sunken structure looks like the victim of a catastrophic flood.

An aluminum skeleton brings Chinese mythology to the French shore.

This home designed for chocolate magnate Antoni Amatller is an exquisite treasure-box of Catalan Modernism.

A museum dedicated to the history of a terrifying secret police is now held in their former headquarters.

Remote town home to Himachalis, Israelis, and tons of hashish.

The abandoned site of the Beatles spiritual awakening and subsequent revolt.