This striking public art installation is suspended above a public park, designed to gently move in the breeze.

A serene temple with stunning stained glass hides in downtown Dallas.

This downtown Dallas art installation is always on the lookout.

This tower once served as a radar station during the Cold War.

A small sanctuary carved into the mountainside near the tallest point in continental Portugal.

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

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

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

This impressive rupestrian engraving dates back to the Upper Palaeolithic period.

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

An architectural gem nestled into a promontory overlooking a prehistoric landscape.

The ancient sauropod tracks found in this former quarry are some of the largest in the world.

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

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

The "Little Ones," show Portugal in full miniature splendor.

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

Come for the bread-themed puppet show, stay for the buffet.

Nestled in the mountains of Portugal is a tiny village made almost entirely of schist.

This castle has links to Portugal’s founding and struggles for independence.

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

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

An abandoned tuberculosis hospital said to be haunted by the patients who died within its walls.

A micronation on an islet along the coast of a Portuguese island.

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