"World machine" built by an untrained Austrian farmer.

Bizarrely-painted church designed by a controversial artist.

This spire on an Austrian mountain is wrapped around a long spiral slide and has the world's tallest wooden observation deck.

One of the largest squares in Europe contains an entire artificial island.

A complex, nine-layer maze on the grounds of a Venetian doge's playground.

Hidden in an Italian forest is a completely homemade amusement park that has taken a lifetime to create.

According to the local folklore, the myriad colors of this lake are the result of a lovelorn wizard's blunder.

This centuries-old Italian chapel hangs midway down a sheer cliffside.

This winding road through an Italian canyon may be the most scenic drive in the world.

These delicate sand pyramids look like naturally occurring gothic spires.

A star-shaped fortress town fort built in the geometric model of the Renaissance utopian city.

This overgrown mountain village has been abandoned for nearly a century.

One of the largest caves in the world open to the public.

A forgotten graveyard lost in the tangles of an overgrown garden.

Legend has it fairies gathered at the site of this medieval castle.

A self-proclaimed libertarian micro-state on a tiny bit of disputed territory between Serbia and Croatia.

After 11 years of reconstruction work, Slovakia's finest hilltop chapel complex is finally reopen to the public.

Inside the Šomoška National Nature Reserve exists a unique rock formation rarely seen in the world.

These 13th century documents come housed in 18th century shelves organized by a 19th century historian.

An industrial site turned into Hungary's most cherished natural wonder.

Hundreds of boat-shaped headstones fill this graveyard as part of a centuries-old custom with mysterious origins.

Hungarian mummies in beautiful painted coffins.

The abandoned military base looks like a post-apocalyptic wasteland.

This Hungarian stilt village is built in a lake that never freezes over due to the power plant that that uses it as a cooling pond.