Two stone columns flank the grand Venice square, but there were supposed to be three.

Go inside to really appreciate this 500-year-old technological masterpiece.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

Continuing the tradition of the dime museum in style.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

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

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

A psychedelic labyrinth on the San Francisco bay.

The most elaborate of 12 medieval arched doorways to the old city of Burgos.

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

Originally used to sell brandy, the bull-shaped billboard became an iconic symbol of Spain.

The world's most elegant power lines.

A curious carving hides on a marble column in the Mosque-Cathedral of Córdoba.

Of the many chalices in the running for the Holy Grail, this one in Valencia Cathedral sure looks the part.

Rare karst landscape eroded from a flat seabed.

The world's largest wooden structure.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

Opulence and fantasy collide in this royal chair which is supposedly made with unicorn horns.

The old observatory in Copenhagen has a spiral corridor used as a racetrack.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

An ultra-modern diversity park in Denmark has turned an entire city block electric pink.