This collection of Christian churches are nestled in the cracks of a rocky hill in Northern Nigeria.

Seven streams tumble over a cliff, resulting in this dazzling waterfall in the Nigerian rainforest.

The last remaining site of Yoruba worship of the fertility goddess.

This Nigerian nature reserve is home to the longest canopy walkway in Africa.

A quirky house created entirely out of glass bottles combines a collector's spirit with an artist's flair.

On a quiet suburban street stands a peculiarly decorated house covered in mosaics.

Whimsical artist house in the New Jersey woods.

An eccentric artist's abode in this small Italian town has been transformed into a surreal temple of mosaic madness.

Mosaics created from 11 million cigar bands.

A 125-meter long "tribute to the Brazilian people."

Lived-in building, bedecked with an astonishing array of mirror mosaics.

Detailed facade of a brownstone in Boerum Hill.

A home covered with elaborate mosaic and other pieces of art.

This house covered in small stones was the work of one man over the course of nearly 30 years.

One man's collection of found art, sculpture, and ephemera adorns his two side-by-side homes.

An art-filled botanical garden and former dyeworks hiding in plain sight.

Personal garden filled with mosaics made of recycled garbage.

A hidden art gallery in an abandoned Warsaw fort.

A nearly 500-year-old sculpture depicts a man eating a sack of babies, and no one is sure why.

Caves famous for the dragon-slaying saint who lived there.

This lovely little bridge hidden in a Switzerland gorge is essentially a fairytale.

Started as a kitchen garden, now the second largest botanical garden in the world.

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.