This abandoned Navy base was transformed into an off-grid alternative living community for thousands of people.

Invisible bridge parts the waters, invoking biblical images and preserving the ominous feel of an ancient moat.

Golden Gate Park's historic collection of plants.

At the foot of a waterfall lies a peaceful swimming lagoon and evidence of over 60,000 years of human habitation.

This giant temperature attraction created some giant electric bills.

Dramatic river bend surrounds a natural red-rocked pedestal.

Malaysia's floating mosque.

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

Wonderland replication in progress by one persistent man.

Version of the French Riviera destroyed by the sea.

A hand-built folk art installation covered with messages of God's love.

A mosaic-tiled house built by graveyard sweeper Raymond Isidore.

A self-built mosaic house and sculpture park.

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

The bizarre visions of H.R. Giger, tucked away in a Swiss medieval city.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

The ghostly remains of an accidental sea.

Milan's duomo is covered in beautiful carving including a curious "dinosaur-like" beast.

A Buddhist theme park brings you a Buddhist version of Hell.

The Jesus tree of Malta bears a striking resemblance to Christ on the cross.

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

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

A mythically themed self-built sculpture park.