The sunlight passing through the opening of this huge cave system creates a magical effect.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

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.

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

This fountain of a little boy that spits on passersby at erratic intervals is a town icon.

Every half hour the eye-rolling clock face sticks out its tongue to mock the good citizens of Koblenz.

This gem from the industrial age helps visitors and residents alike traverse hilly Stockholm.

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

An enormous alien invades Woking, England, as an homage to the H.G. Wells classic 'The War of the Worlds.'

A magnificent, long-abandoned castle built in the wake of the reconquest of Spain.

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

This marine reptile was discovered by one of the 19th century's greatest fossil hunters.

Touching this 18th-century Scottish philosopher’s toe allegedly conjures good fortune.

Fortune tellers, snake charmers, poets, and storytellers all gather on this historic square in Morocco.

This small museum in a 17th-century building honors three iconic Scottish writers.

This monastery built into a cliff hides a perfectly preserved hermit in a glass coffin.

It took 40 years to build this Eden-like garden in Marrakech, later restored by Yves Saint-Laurent.

Colorful umbrella-covered trees in Singapore's Little India look straight out of Dr. Seuss.

Singapore's landscaping project is home to 18 incredible Supertrees.

A historical convent known for taking in bad luck babies left on its doorstep is now an upscale shopping center.