A unique exhibit lets blind people experience famous works of art and architecture with their hands.

A huge cathedral single-handedly constructed by one eccentric monk.

A magnificent, long-abandoned castle built in the wake of the reconquest of Spain.

A cheese discovery made by shepherds became the pride of a region.

The Roman city was the birthplace of various emperors and is home to one of the empire's most impressive architectural feats.

This surreal-looking tree pruned more than 1,000 years ago is still producing olives for oil.

Now a pile of ruins and rubble, this was a lovely mountain town as recently as 1960.

An abandoned Indian-inspired mansion.

Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

A magnificent place to see authentic paleolithic cave paintings that are an astounding 33,000 years old.

A model solar system adds a celestial touch to this suburban park.

The ruins of an ancient stadium that hosted gripping chariot and horse races.

An impressive display of ships and artifacts from the ancient Mediterranean maritime trade.

The unexpectedly beloved remnants of a controversial thermal power plant.

This underground church is topped with a 500-foot cross that is seen by many as a beacon of fascist hubris.

Two towns are linked by an engineering marvel masquerading as a boring suspension bridge.

A well-restored ancient archaeology site gives a real feel for life during the Roman age.

The largest prehistoric cemetery on the Balearic Islands dates back over 2,500 years.

A beautiful little museum hidden away in the heart of Barcelona holds a treasure trove of Ancient Egyptian artifacts

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

An unusual number plate signifies the building's saucy past.

With a history of slaughter, feast, and famine, remnants of the pork industry decorate this area--even its church.

What looks like a normal building is really a hollow facade hiding a subway vent.

The headless bodies of more than 1,300 guillotined victims of the Reign of Terror are buried here in mass graves.