The oldest housing complex in Riga is a mini timeline of architectural trends.

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

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

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

One of the world's oldest working clocks is curiously missing the Zodiac sign of Libra.

Fortified medieval tower house with lovely roof garden.

Those who own or stay at this 500-year-old, allegedly cursed house often meet terrible fates.

The small peaceful island off the Venice tourist circuit is where the city began more than 1,500 years ago.

Venice's island of the dead.

A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

Pilgrimage site for star-crossed lovers.

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 statue celebrating everyday life in Dublin has a few unsavory nicknames.

A statue in the center of Dublin dedicated to one of their favorite sons of rock & roll.

The enchanting archway is the only surviving portal into Dublin’s lost medieval wall.

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

A series of caves under Castle Hill that once held the prisoner Vlad Tepes, better known as Count Dracula.

If you visit Santa's village, you can get your passport stamped to show you crossed into the Arctic Circle.

Roughly 17 million letters to Santa have found their way to this Arctic Circle post office.

Rent out a glass igloo to watch the Northern Lights like you live in the future.

The Guardian of Tallinn.

The oldest church in the Estonian capital is home to over 100 fantastical cemetery coats-of-arms.

A natural wonder in south Denmark.