A beautiful but toxic fountain of mercury.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

The studio of Catalonia's most famous theatrical designer remains exactly as he left it.

The world's largest wooden structure.

Bold black and white motifs of life and death add a dramatic flair to this 17th-century crypt.

An architect transformed this abandoned cement factory into his castle-like workshop.

A self-built mosaic house and sculpture park.

Guests can stay at a hotel in the former French abbey where lie the tombs of King Henry II and King Richard the Lionheart.

Figures of unknown origin carved into the surfaces of underground caves.

Home to the "Rat King" of Nantes and other wonders of the natural world.

Massive puppet-automaton machines created by French artist collective Machines de l’Ile.

Do these monsters look familiar? The gargoyles on this church are all from pop culture.

An aluminum skeleton brings Chinese mythology to the French shore.

One of the great treasures of Neolithic art lies within this carefully constructed pile of rocks.

This strange geological landscape erupts with sudden bursts of water.

A Maori village obliterated by an 1886 volcanic eruption.

Deadly scalding and one of the largest hot springs in the world.

Some of the clearest water anywhere in the world.

The glacier tucked within a New Zealand rainforest.

This family mausoleum is steeped in symbolism and looks more like a fantasy location than a grave.