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

A quaint medieval millhouse hovers surprisingly above the waters of the Seine.

This impressive chasm is one of the longest natural underground cavities in the world.

Abandoned blockhouses from Nazi Germany's Atlantic Wall erode into the sea on a French beach.

Hundreds of stone stairs and a winding medieval bridge connect this haunting Spanish island to the mainland.

One of the largest Roman settlements in Portugal.

Nestled in the mountains of Portugal is a tiny village made almost entirely of schist.

A Franco-era dam flooded (almost) everyone out of this centuries-old Aragonese town.

Hundreds of preserved dinosaur footprints can be found along a hiking trail in this small village.

These narrow stone granaries have been used to store and dry out grain for hundreds of years.

An abandoned mining complex in Serra do Gerês.

Local lore says the devil built this beautiful medieval bridge to help a fleeing bandit.

A small Portuguese cottage formed between boulders in the countryside.

You can cross from one country to another in a single hop on this little bridge.

This crumbling Portuguese ruin overlooks the populace it once ruled.

"Portugal's Stonehenge" is made up of nut-like stones aligned with the heavens.

A 16th century chapel decorated with bones, skulls, and entire bodies hanging from the wall.

Perhaps the most spectacular grotto along the Algarve coastline.

This unassuming chapel in Portugal plays host to a ghoulish collection of bones.

This small chapel is built of human bones and decorated with a golden skeleton.

An abandoned mine now resembles a post-apocalyptic landscape of derelict buildings and blood-red pools of water.

This amended headstone marks the grave of a participant in one of the most successful military deceptions of all time.

Considered the birthplace of the Copper Age and Bronze Age, the river is tinted red from 5,000 years of mining.

Along the most northwestern point in Africa is an ancient cave surrounded by legends.