This little patch of Europe remained neutral for more than a century because of a mine.

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

This foreboding medieval castle was twice besieged by barons rebelling against the English king.

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

This narrow Ghent alleyway is an officially sanctioned street art tunnel.

This Prague museum collects brutalist relics and memories from the country's former Soviet rule.

A museum of alchemy and a basement laboratory all housed in an ancient building in a Gothic tower.

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

An extensive collection of reliquaries containing the bones of saints housed in the largest Catholic church in Venice.

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

Hanging within this medieval church are the bones of a beast allegedly slain by a fourth-century saint.

Thousand-year-old Viking runes adorn an ancient Greek lion at the entrance to the Venetian Arsenal.

A beautiful maze marks where three countries meet.

These whimsical rabbit figures are not as innocent as they might look.

The shiny silver little brother to Copenhagen's Little Mermaid statue.

Old Danish castle immortalized in Shakespeare's Hamlet.

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

Copenhagen's celebrated theme park and gardens.

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

Hans Christian Andersen for the postmodern world.

This striking royal residence is the largest Renaissance-style castle in Scandinavia.

Six beautiful wooden giants are hidden around Copenhagen.

Nordic giants resurrected from the sea and restored to their former greatness.

A saintly relic hidden in a Prague church basement.