Large, airy hallways hide within an impenetrable fortress that beckons urban explorers.

A musical instrument played by the sea.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

A statue dedicated to football's first African superstar and Portugal's greatest ever player

Once a thriving textile powerhouse, now a relic of what once was.

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

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

Men in rubber-soled boots serve as your "brakes" on this toboggan ride Hemingway described as "exhilarating."

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

Now a ruin, this grand resort was coveted by a communist autocrat and an eccentric Japanese golfer.