A mysterious artist-run cabinet of curiosities and library.

This wildly-tiled artist's palace is a living and growing account of the creator's life, loves, and labors.

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

Baroque celebration of the end of the Great Plague of Vienna.

Op-art architecture designed for happiness.

The topiary maze at the Habsburg hunting lodge.

Two towns are linked by an engineering marvel masquerading as a boring suspension bridge.

This 19th-century fountain's namesake animal isn't what you think it is.

An archeological treasure trove stumbled upon by a couple of children.

Hundreds of stone stairs and a winding medieval bridge connect this haunting Spanish island to the mainland.

Marvel at this immense work of art that greets arrivals to the city.

Giant topiary dog once played a role in a terrorist bomb plot.

The Museum of the Forum of Caesar Augusta showcases the city's ancient Roman sewage system.

This 11th-century fortress is now the seat of Aragon’s state legislature.

A statue of a boy looks up at where the famous rival to the Leaning Tower of Pisa once stood.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

A lush oasis full of vibrant plants and striking geometric displays.

Portugal’s highest lighthouse has one of the most impressive focal planes in the world.

An obscure walkway dedicated to a scientist who helped pave the way for the world to sit up and take notice of Manchester.

This bronze statue stands throughout the year and illustrates an urgent message about the environment.

Over 70 independent businesses have set up shop in this former Victorian department store.

Once called "the biggest room in the world," this Victorian-era hall is so large that it contains a smaller 1970s heptagonal theatre.

Be on the lookout for the symbolic insect all over the city.

A 19th-century time capsule of travel, fiction, and historic texts still available to the public.