This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

In Portugal, a secluded stretch of untouched natural beauty hides at the bottom of a steep hill.

This star-shaped military outpost is now simply trying to protect itself from neglect.

"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.

A chunk of the "true cross" is held in this small Portuguese church where modern day exorcisms are said to be common place.

Perhaps the most spectacular grotto along the Algarve coastline.

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

An art museum with an eclectic design and a scandalous past.

Beautiful public park off the beaten path and away from tourists.

Brasilia's oldest newsstand is sheltered by a wish-granting tunnel-tree.

A stunning Catholic cathedral built by a curve-loving communist in Brazil’s newly created capital.

This foreboding building was the headquarters of the terrifying Spanish Inquisition in Mexico.

This incredible college library is a visual masterpiece of mosaic art. It also looks kind of like a giant boombox.

These haunting ruins of a 700-year-old Prehispanic city have witnessed centuries of wars and massacres.

An island filled with hundreds of hanging, decomposing, decapitated dolls.

Frida Kahlo's childhood home, now a museum of her life and works.

The only castle in North America to ever house European sovereigns.

This pre-Hispanic apartment complex also includes ancestral paintings that point to its military past.

A striking depiction of Teotihuacan's mysterious "Spider Woman."

This archeological site hidden behind Teotihuacán's pyramids shelters 1600-year-old murals.

These millennia-old murals once covered the walls of residential complexes across the ancient city.

Dating back to the second century, vestiges of prehispanic mural paintings are found in this underground palace.