The ruins of a 16th-century bridge loom over Olivença's sovereignty.

A naturally occurring amphitheater carved by erosion into the mountainside.

This Gallo-Roman sanctuary is dedicated to Serápis, god of the underworld.

Some 4,000 individual tiles make up this striking blue billboard from the golden age of air travel.

A glacial valley filled with silver beech trees in the mountains of Portugal.

Panoramic views from the mountains over a facility built to provide tuberculosis patients with fresh mountain air.

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

This glass skywalk offers vertiginous views down the volcanic cliffs to the beach below.

The extravagance of Portugal’s "Pink Palace" resulted in a noble title being awarded to its owner.

Tucked away inside this concrete building is a church and its grand display of brutalist architecture.

This abandoned fortress still stands guard over the Guadiana River despite a history of warfare.

An icon of the city, this chapel features an amazing dome ceiling and offers panoramic views.

Bits of flat terrain surrounded by cliffs make one of the most beautiful landscapes in the Azores.

These small, triangular, colorful houses are a staple of Madeira Island.

One of the world’s longest pedestrian suspension bridges.

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

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.

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

These rock drawings in the Côa Valley also create an ancient optical illusion.

Iron Age runes and ruins hide in plain sight along this Portuguese beach.

An abandoned mining complex in Serra do Gerês.

This chapel is the site of a yearly pilgrimage that originated during the Middle Ages.

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