Three bridges and one giant canyon make up this fantastic Spanish settlement.

Spanning the El Chorro gorge, this pathway used to be one of the most dangerous crossings in the world.

Rare karst landscape eroded from a flat seabed.

This otherworldly French waterfall looks like its waters have turned to stone.

Green labyrinth formed by a karstic maze hidden in a preserved oak forest.

Perfume museum and library.

Since ancient times these picturesque springs have been providing bathers with healing waters.

A chapel on a volcanic core, marking the end of a successful journey.

A tiled, multi-level garden of survival in Lyon.

This stunning French estate was so lavish that it landed its original owner in jail for the rest of his life.

Museum in a swimming pool where the water still flows.

This stunning natural double arch, the largest in the Alps, went undiscovered until 2005.

This professional clown's home is an outsider art wonderland.

An icy lake tucked among jaw-dropping alpine panoramas.

An overlooked marble is the only surviving in-place 18th century example of the measurement that changed how we define distance.

A haunting collection of the vanished and disappearing natural world.

A public park off the beaten path with a beautiful waterfall and 13th century Cistercian abbey.

Even France's favorite aquatic son Jacques Cousteau, couldn't get to the bottom of it.

One of the largest ochre quarries in the world, hidden in a limestone landscape.

An Australian lake whose pink hue defies scientific explanation.

A 200-year-old collection of oddities and medical paraphernalia.

The strange behavior of a tween led to allegations of witchcraft and a curse being placed on anybody within earshot.

Macbeth's infamous "Great Birnam Wood."

This Scottish manor house is a lush relic from the life of a literary great.