Some call this eerie forest of crooked trees the "Bermuda Triangle of Romania."

This demon atop the Notre-Dame de Paris looks utterly bored.

The pile of books behind the dignified writer gave the statue a most undignified nickname.

This amazing 15th-century mural remained hidden in plain sight for centuries.

A lush indoor jungle fills this bustling Madrid transportation hub.

A plaque marks the spot where the saint was shoved off the Charles Bridge and into the river.

These mysterious Viking chess pieces spent centuries hidden on a remote Scottish island.

This influential Renaissance-era library was once the haunt of kings and monks.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

A Hungarian pharmacy museum with a box full of mummy powder.

This easily overlooked memorial immortalizes the scars from the 1956 Hungarian Revolution.

An impressive armored bronze effigy marks the tomb of one of the medieval era's greatest warriors.

This spectacular mosque houses the second-largest chandelier in the world.

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.

An unusual ode to the late Irish playwright, complete with a squiggly bust and coffin-shaped bench.

Hundreds of caves once used to store grains and animal feed.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

A measuring mishap led to these artificial stone ladies losing their stomachs.

A network of ancient Egyptian tombs built into the cliff face along the Nile.

The fierce beast perches atop a pedestal marking where the historic City of London gates once stood.

Summer in Scotland begins with a spectacularly wild and colorful event rooted in ancient pagan traditions.

A castle in the Scottish Highlands has been continuously inhabited since the 1300s.

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.