An alchemist's "magic door" stands in the middle of a Roman park.

Architectural monsters are devouring this palace's every door and window.

This Roman arch marks the location of an ancient gate at one of the Seven Hills of Rome.

Museum dedicated to literary greats of the Romantic Period is also the home in which Keats met his untimely end.

A sculpture serving as an homage to Pope John Paul II.

Ancient ruins hidden underneath a modern luxury hotel.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

A whimsical bridge uses saxophones to pay tribute to two great men and the European Union.

Each spring, a dreamlike carpet of bluebells overtakes the forest floor.

Lavish royal estate punctuated with heated greenhouses.

Theme park featuring miniature replicas of European monuments.

This massive collection of taxidermy is full of specimens collected by missionaries during their international travels.

The final resting place of the great navigator, or maybe his brother.

A stunning 18th-century site where pilgrims ascend by a series of punishing stairs only to return via funicular.

This restored Portuguese cafe may well be the most beautiful place in the world to grab a Big Mac.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

Elaborately carved to showcase the glorious wealth that the age of exploration brought to the Portuguese empire.

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

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

"Portugal's Stonehenge" is made up of nut-like stones aligned with the heavens.

A collection of objects supposedly singed by the hands of souls in purgatory.

The final resting place of the poets Shelley and Keats.

More sculpture than building, this architecturally significant temple was built on the spot of Saint Peter's crucifixion.