Red, white, and blue painted steps along with a Union Jack celebrate the outcome of Gibraltar's 1967 referendum.

Single runway interrupted by a busy road that cuts across its middle.

A 19th-century mansion houses the largest collection of gin in the European Union.

The medieval town's star-shaped walls are geometrically dazzling, though not entirely impenetrable.

One of the world’s longest pedestrian suspension bridges.

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

The corpse bride of Portugal.

Dead weights honor the dead of Portugal's fishing industry.

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

The best place in the world to buy tinned fish.

Perhaps the most spectacular grotto along the Algarve coastline.

Ring the bell to enter a bar that looks equal parts museum and old curiosity shop.

The world's oldest bookshop still in operation.

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

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

150 or so scrounged-up lamps, chandeliers, and lanterns light up this alley in central Athens.

One of the most photographed locations in the entire city.

A historic building houses one of the most important archaeological institutes in Europe.

An artistic melting pot inside an old roadside inn from the Ottoman era.

Get hands on with the technological marvels of the Classical world.

One of the greatest collections of coins in the world is housed in the former mansion of an archeological pioneer.

This seaside sanctuary was once one of the most important religious sites for women in ancient Greece.

This 13th-century monastery chiseled into the side of a mountain is equipped with a bridge that can be lifted to protect against raids.

A sprawling collection of books and manuscripts about ancient Greece that would have put their famed libraries to shame.