This massive subterranean fissure is known as the "underground Grand Canyon."

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

Bridge that died in war and was resurected.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

A towering spire in the fortress of Kalemegdan honors the victorious armies of Serbia during their struggles against the Ottoman Empire.

Scattered throughout London are ancient remnants of the city's former bounding wall.

This one has sailed five times as far as Sir Francis Drake's famous ship.

A little sculpture with a large wardrobe.

This collection of over 50 murals celebrates Brussels' rich history as the self-proclaimed home of the "comic strip."

Swedish skyscraper with a 90° twist.

This chimerical bridge/tunnel appears to dead end right into the sea.

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

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

A huge wooden clock that is so beautiful its creator was forcibly blinded.

Flamboyant architecture from the turn of 20th century.

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

3,000 market stands in five former Zeppelin hangars.

This Nazi ruin was the site where Hitler was almost blown up by a suitcase bomb.

Open-air museum with a large collection of Soviet-era statues.

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

A curious art park at the geographic center of Europe is home to 3,000 television sets and other wonders.

Ever-growing collection of devils in art.