The atmospheric ruins of a historic church can be found on a hill above the city of Oviedo.

Head to the mountains to catch a glimpse of Spain's endangered subspecies of brown bear.

These primitive rock paintings include a very beloved depiction of a woolly mammoth.

A small church ornamented with medieval erotic sculptures.

A landscape decorated with enormous skull sculptures.

This Bronze Age man spent millennia buried in a mine, giving his bones an eerie hue.

An abandoned Indian-inspired mansion.

The 20th-century church looks like a rustic version of the Sagrada Familia.

A historic Christian shrine nestled within a spectacular natural cave.

This Gothic church houses ornate royal tombs and a magnificent gilded altarpiece.

The most elaborate of 12 medieval arched doorways to the old city of Burgos.

The tiny Spanish village that long refused to change its outrageously anti-Semitic name.

Salaguti's live-in museum: a fortress against criticism and consumer art.

A small house in Tazones, completely covered in shells.

An archeological treasure trove stumbled upon by a couple of children.

This 19th-century fountain's namesake animal isn't what you think it is.

Stormy conditions send jets of seawater bursting through holes in the cliffs.

The walls of these four caverns are filled with art that dates back to the earliest human presence in Europe.

Large collection from the 3rd millennium BCE.

This mystical orb covered in strange symbols is thought to have been used in ancient Greek magical rituals.

This ancient hydrological marvel is now the base of a modern outdoor cinema.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

The ghost town where the villagers refuse to leave.