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

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

Catering to broken dolls for almost 200 years, this repair shop is now a charnel house of doll parts.

The world's oldest bookshop still in operation.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

Houses are tucked between, on, and underneath giant boulders.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

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

A collection of crumbling mansions stand as a reminder of a more prosperous time in this Indian village.

This precariously balanced boulder is said to be a hunk of stolen butter dropped by the gods.

This extraordinary geological oddity resembles human-made pavement.

Ten shipwreck-shaped chalets lie along the sand dunes on Namibia’s Skeleton Coast.

This enormous censer uses a pulley system installed over 400 years ago.

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

Remarkably intact Roman stone fortifications have encircled this Spanish city for centuries.

Seaside ruins of a settlement that date back to the first century B.C.

An architect transformed this abandoned cement factory into his castle-like workshop.

Of course Salvador Dalí lived in a castle...

Stunning Roman aqueduct used for 1900 years and still standing.

One of the few remaining ancient aqueducts described by Frontinus as 'the most solemn testimony of the Empire.'

A landscape decorated with enormous skull sculptures.

An ancient Egyptian temple in the middle of Madrid, Spain.

Spanning the El Chorro gorge, this pathway used to be one of the most dangerous crossings in the world.