The medieval castle built as headquarters for the Pope's secretive Knights Templar.

The former Nazi Germany concentration camp stands as a museum to remember this dark chapter in European history.

Venice's island of the dead.

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

2300-year-old Roman road connecting the empire.

Famously misunderstood wonder of the ancient world

Real bones which are said to have belonged to a Polish dragon.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

A striking symbol of the Bulgarian capital.

A Bulgarian monument to Russia's role in World War II is constantly being painted in pop culture protest.

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

A black cat protests the City Guild in Riga's Old Town.

3,000 market stands in five former Zeppelin hangars.

A former Latvian headquarters of the brutal KGB secret police is now open as a grim reminder of their atrocities.

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

Enigmatic tombs and cave dwellings on the outskirts of a rural village.

This spectacular dome managed to survive after being bombed in World War II, in an event known as the "Miracle of Mosta."

The first Catholic church in Singapore is a Neo-Gothic colossus with a rich architectural history.

Home to more than 13,000 pieces of war memorabilia and military equipment.

South Korea's women of the sea have completely flipped their society's structure by becoming revered fisherwomen.

This peaceful, round shrine in the middle of the Sri Lankan jungle acts as a beacon of peace.

This elaborate temple was built around one of the Buddha's teeth.

Once thought to be the Garden of Eden it holds a holy footprint claimed to belong to Adam, Buddha and Shiva.