A lovely look back at the manufacture and use of paper in all its forms.

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

Marvel at the opulent Art Nouveau interior while dining on dirt-cheap French classics.

A set of seven houses, each built in a style that represents a European country.

An overgrown and largely forgotten cemetery lies hidden within the outskirts of Amsterdam.

Nicolas Schöffer's massive interactive sculpture was assembled in 1961 and brought back online in 2016.

A once-magnificent collegiate church is falling into ruin.

A massive, gleaming sea turtle with a rider atop its shell looks out over the horizon.

Rediscovered in 1992, this abandoned medieval village once flourished by fishing and piracy.

The former home of a trailblazing surrealist is still filled with haunting dolls and grim paintings.

This half-finished "city of toys" was almost Italy's own Las Vegas.

This medieval castle was painted pink as part of a now-abandoned children's theme park.

A network of concealed passageways lies within a busy London Underground station.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

Though its celestial ceiling is impressive, the true star is the vast collection of French books.

Giant busts of 42 U.S. presidents are sitting in a field in Virginia.

Limestone grottoes turns everyday objects into stone.

Miles of man-made caves and tunnels are currently used for cultivating mushrooms.

A tiny, forgotten park of surrealist sculptures in Angouleme.

The bizarre home and sculpture garden of an eccentric artist.

The largest underground church in Europe.

Take a leisurely walk through the park to find the seven giant troll sculptures hidden throughout the park.

A collection of weird and wonderful art fills a former houseplant nursery.

This ghost town in Belgium will lose its street art when it ceases to exist.