This peaceful park saw the beginning of an extraterrestrial invasion in H.G. Wells's 'The War of the Worlds.'

The remains of the oldest synagogue in Britain lay forgotten for seven centuries, hidden under a humble shop.

This sculpture combines the literary Alice with her real-life inspiration.

This public pool is one of the last remaining lidos of the countless built in the 1930's as public works projects in the United Kingdom.

These steps were uniquely crafted so Bishop Richard Fox could travel between his home and town.

The lasting remains of the Balloon Section of the British Armed Forces.

Miles of man-made caves and tunnels are currently used for cultivating mushrooms.

An arresting arch punched straight through a mountain provides one of the most scenic spots, and challenging climbs, on the planet.

This narrow path was cut right into a French mountainside to feed the country's early naval expansion.

Sanctuary on a ridge near an ancient shrine to a "Black Madonna" built by the founder of Opus Dei.

Sculpture of a legendary French dragon.

This army of concretions is an unexplained geological phenomenon unlike anything else in the world.

A natural arch carved by a river gave its name to the so-called "Cave of Forgotten Dreams."

Vaucanson's most famous automaton, brought back to life.

When the imprisoned pope's remains were finally returned to the Vatican, his heart stayed behind in France.

This whimsical castle of grottoes was the labor of love of a French postman, and one of the greatest achievements of outsider architecture.

At this monastery, monks make raw-milk cheese and use excess whey to create methane that powers their hot-water system.

A fortified palace in the shape of a ship on the Thiou river.

A statue of the Swiss cartoon character stands outside the school that inspired his creator.

This statue of a Hindu cosmic dancer at CERN is a metaphor for modern physics.

The remains of this castle, known as the Witch’s Eye, watch over the Thur Valley.

A magical and peaceful ruined Cistercian abbey in what is now southern Belgium.

This "social palace" housing complex created a relatively stable and self-contained worker's society... for a time.

A 141-foot wave of crashing lumber guards the entrance to the Grand Place in Mons.