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

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

Rainwater transformed this old quarry into a peaceful pond you won't find in most tourist books.

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

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

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

Europe's oldest still-operational tea farm also boasts a spectacular view.

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

A cluster of granite granaries perched on stilts.

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

A lush oasis full of vibrant plants and striking geometric displays.

A windswept necropolis carved into the rocks overlooks the "most Portuguese town in Portugal."

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

A majestic hotel for dreamers rises from the center of a fairytale wood.

This crumbling Portuguese ruin overlooks the populace it once ruled.

One of the world’s longest pedestrian suspension bridges.

A perfectly circular lake is formed by the crater of an ancient underwater volcano.

Local lore says the devil built this beautiful medieval bridge to help a fleeing bandit.

This abandoned five-star hotel is now a five-star urban exploration destination.

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

A small but charming botanical garden that contains many exotic plant species.

An abandoned mine now resembles a post-apocalyptic landscape of derelict buildings and blood-red pools of water.

Elaborate tile work in this railway station tells the story of Portugal.

When Azorean green tea meets volcanic hot springs water, a luminous brew is born.