Lithuania's outdoor sculpture trail of wooden folk art.

A Spanish town built into the cliffs.

Village situated on a narrow volcanic escarpment.

Wonderland replication in progress by one persistent man.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

A beautiful maze marks where three countries meet.

A 16th-century horror show built in a lovely Italian garden.

Eco-village hidden in the foothills of the Alps that created a massive system of psychedelic underground temples.

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

A beautiful and classically designed villa, with an hourly infestation of monsters.

The largest ice cave in the world is thought to be the entrance to hell according to Austrian legend.

The world's most important buildings shrunk to a tiny size.

Museum devoted to the artificial language of Esperanto.

Northern Ireland's Brobdingnagian stepping stones.

A musical composition 1000 years in length plays at the Trinity Buoy Wharf in London.

The biggest and deepest Cold War bunker open to the public can be found in southeast England.

The sign at the garden gate reads: "These Plants Can Kill."

An eccentric garden of sculptures crafted in India decorate an Irish green space dedicated to Alan Turing.