The extravagance of Portugal’s "Pink Palace" resulted in a noble title being awarded to its owner.

A Surreal flight of architectural fancy in Vietnam's Central Highlands.

These termites have an large and deadly abode—impressive by day, dazzling by night.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

The ancient water tanks remain some of the ruined city’s most beautiful architecture.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

Gaze upon chocolate sculptures depicting everything from chariot races to Gaudí's famous church at this shrine to sweets.

A mud statue stands in the dark tunnels, seeming to hold up the weight of the city above.

This recessed garden protects thousands of mountain plants by creating its own microclimates.

This little-known relic crypt holds stolen parts of a Roman Empress.

The spiral staircase hidden inside this giant Parisian column was likely built for Catherine de Medici's astrologer.

Beggars were miraculously "cured" of their fake ailments when they returned home to this 17th century Paris slum each night.

The headless bodies of more than 1,300 guillotined victims of the Reign of Terror are buried here in mass graves.

A popular shrine where the Blessed Virgin allegedly appeared in 1830, displaying a holy armchair and two incorruptible remains of Lady Saints.

Noirish green neon marks the location of one of the oldest private detective agencies in France.

This surreal statue brings a famous French novel about a supernatural cad to arresting life.

Exquisite wall sculptures carved in secret by an early quarryman in an obscure corner of the Paris Catacombs.

As can be expected from a centuries old church built in a canal city, the undercroft of this house of worship is beautifully flooded.

The ruins of an 11th-century Norman castle with a rare, perfectly circular shape.

A circle stone within a stone circle.

The largest greenhouse in the world is home to over one million types of plants.

An abandoned mine now resembles a post-apocalyptic landscape of derelict buildings and blood-red pools of water.

At 929 pounds and 26 feet tall, this stainless steel fork can only be used by the likes of King Kong.

A licentious look into Singapore's past, full of disorderly bric-a-brac and disreputable characters.