Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

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

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

Elaborate tile work in this railway station tells the story of Portugal.

This restored Portuguese cafe may well be the most beautiful place in the world to grab a Big Mac.

A hidden three-foot-wide house separates these two regal churches.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

This unique rock formation is quite the local celebrity, although one day it may come crashing down.

This museum tells the story of lake dwellers from 4000 BC to 850 BC, replete with stilt houses and goats.

A UFO-shaped event building originally intended to be a science museum showcasing the future.

Take a walk in a recreation of ancient Rome.

A small part of Russia that does not touch any other part of Russia.

According to the Guanches, the aboriginal people of the Canary Islands, the king of evil lives inside this volcano.

Over time, this castle grew to encompass the entire island.

The Frank Zappa fan club erected this monument to their prog-rock hero to mark a new era of post-Soviet Lithuania.

Rub it for a bit of good luck.

An abandoned masterpiece of Soviet Brutalist architecture.

This former KGB building is now a museum memorializing the people who suffered during the Soviet regime.

While this monument tile is shrouded in mystery it also marks the end of the longest ever human chain.

Plaques celebrating Lithuanian writers freckle a wall of this picture-perfect path.

Legend has it that Napoleon Bonaparte fell in love with this Gothic church.

Travelers who fall victim to this mermaid's charms are destined to stay in Užupis forever.

This micro-nation may be some sort of prank, but its constitution sure seems official.

World's largest bell sits on the grounds of the Kremlin in Moscow.