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

This magnificent castle grew from a small Moorish fortress, and reportedly inspired two iconic Disney castles.

The first mechanized factory in Spain is also one of the most significant mints in the history of money.

A curious memento mori hangs in the magnificent Cathedral of Segovia.

These "mermaids" that surround a plaza in Segovia are rather sphinx-like.

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

A controversial art piece that harkens back to local folklore.

Stunning Roman aqueduct used for 1900 years and still standing.

A fortress off the West coast of Portugal that dates back to 1502.

This crumbling Portuguese ruin overlooks the populace it once ruled.

One Portuguese poet described this cape, the westernmost point in mainland Europe, as "where the land ends and the sea begins."

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

At night, bats patrol this magnificent 18th-century space in search of book-eating pests.

A unique seaside cave where Aleister Crowley faked his own death.

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

This oddly shaped church resembles a rocket.

A garden in Lisbon filled with giant porcelain creatures.

An early Portuguese serial killer's head is alarmingly well preserved in a jar at the University of Lisbon.

This little-known national museum houses over 40,000 works of art from across the world.

This tile-work piece featuring a chicken riding in carriage is both a remarkable artistic creation and a social commentary of politics and culture in 17th-century Portugal.

This museum contains a vast array of puppets and marionettes from all over the world, featuring incredible works by Portuguese creators.

One man's remarkable private collection of art from around the world.

This once-forgotten oasis in the middle of Lisbon was first created over a century ago quite by accident.

Entire apothecaries are on display at this Lisbon museum, which explores the history of medicine.