Several cannonballs of mysterious origins decorate two buildings in Stortoget's main square.

It is said that each of the white stones in the red facade of this medieval house represents the head of a murdered Swedish noble.

Maybe the only restaurant in the world where your seat will be signed by a Nobel laureate.

Stockholm's narrowest alley is barely over two feet wide.

Also known as the Blue Church, the building was consecrated to the daughter of Andrew II.

Thousands of slain Soviet soldiers are buried within the shadow of this enormous obelisk.

The memorial stands at the intersection of the rivers Morava and Danube.

The world's oldest grape-producing vine has survived four centuries of turmoil and even has its own anthem.

This 135-year-old weather station studied the effects of the climate on human health.

A World War II evacuation tunnel turned into a history display of Croatian state and people.

One of the largest busts in the world celebrates the German city's erstwhile namesake.

A whimsical bridge adorned with decorative dragons.

The largest ice cave in the world is thought to be the entrance to hell according to Austrian legend.

The medieval "dragon" on an Austrian city's coat-of-arms comes to life in a fountain.

This neon lit Georgian cave claims to hold the boulder Prometheus was chained to.

Ancient rock-hewn town that witnessed key events of Georgian history.

A museum glorifying the life of Stalin, located in the city of his birth.

Huge stairway leads to this massive gallery.

This Armenian monastery was carved out of cliffs and named after the spear used to stab Jesus.

A geological oddity topped with a 2,000-year-old pagan temple.

The charmingly disheveled clock tower of Tbilisi's puppet theater.

Europe's largest natural bridge has a 19th century royal chateau built into its side.

A small man-controlled waterfall powers an Art Nouveau elevator and is accessed via narrow gauge, solar-powered tramway.

Ruins of a German Castle on top of a towering stone pillar.