The largest crypt ever constructed in France was built in the 11th century on an ancient Druid sacred site.

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

Bits of architecture from a town destroyed in World War I now decorate this hotel garden.

One of the last realized projects of an influential, self-taught, French Modernist architect Jacques Couëlle.

A total of 22 tiny bridges cross this canal of the Yvette River, forming a unique trail.

A former milk-delivery driver and his wife turn their home into a glimmering mosaic.

Two small chapels housed inside an ancient tree.

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

Inside this former medieval prison is a collection of objects designed to inflict unbelievable pain and suffering on the human body and mind.

The compass on its front was a handy tool for 17th-century merchants who needed to know the direction of the wind.

This former Masonic lodge has been transformed into part museum, part bar, all awesome.

This natural French spring has been turned into a magical grotto by Roman and medieval constructions.

Rare wooden escalators lead deep down into an otherwise staggeringly monotonous tiled tunnel.

This small corner bar is home to a rare 1930s dance organ that still plays tunes for one Euro.

A well-preserved medieval village nested on a rocky outcrop and surrounded by a network of cliffs, natural bridges and canyons.

This fantastical waterfall is hidden in a cave located in a cracked cliff.

The oldest (maybe) swimming pool in Iceland is a stunning oasis built into the side of a lush hill.

Inside this museum, visitors venture through ghost stories entrenched in Icelandic folklore.

This oceanside Reykjavik spot is speckled with recycled sculptures and large stones.

Icelandic folklore says this giant boulder was ripped from the mountains and placed at its current location, where it became home to elves.

An encyclopedic collection of mammal penises.

Cairns built to bring travelers good luck stretch across the land like miniature stone mountains.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

The most powerful waterfall in all of Europe.