A 30-year-old Sycamore tree grown from a seed taken to the moon and back.

This multisensory alley has the ability to remind bustling citygoers to stop and smell the roses.

An old-timey peepshow allows visitors to gawk at some of the world's most freakishly large footwear.

Building owners can take out tiles for free at this repository for historic building materials.

A deer-headed statue that brings together a 12th-century legend and big wave surfing.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

Hidden beneath a beautiful overlook you’ll find the history of the city depicted in comic strip format next to a pay toilet.

The world's oldest bookshop still in operation.

Tucked away inside this concrete building is a church and its grand display of brutalist architecture.

Artists and musicians now rule over this former rail station.

A hands-off space for graffiti artists to hone and display their skills.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

A pair of gigantic baby heads greet passengers at Atocha Station.

Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

This stunning iron gate designed by Modernist architect Antoni Gaudí is filled with mythic symbolism.

The hidden ruins of an old hydroelectric plant reclaimed by nature.

Among the oldest structures in Madrid, these Moorish walls once guarded the medieval city of Mayrit.

Moorish signal station on a stratgic rocky outcrop.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

In the fictional world of Kcymaerxthaere, celestial wonders marked a portal to a powerful route of travel at this site in Madrid, Spain.

One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.

These magnificent city walls rise from the barren sun-baked Spanish plains like something straight out of a fairytale.