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

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

Eat the ultimate iteration of Portugal's most beloved pastry.

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

The 14th-century ruins are said to contain healing powers.

Two monstrous faces loom over a village in Czechia.

Perched above a grotto, this tribute to Mother Nature looks out into the ocean.

Explore the quarry where the marble was sourced for Michaelangelo's David.

The crumbling remains of a 19th-century textile factory.

This enchanting 600-year-old tree is so magical it inspired the beloved tale of Pinocchio.

A great white whale sculpture now sits in the location where the remains of a prehistoric cetacean were found.

South of Bologna, a limestone grotto with a protruding waterfall and a floor full of cave pearls.

Sitting on an Italian hilltop is this surreal fortress built by the mad inventor of electrohomeopathy.

A complex, nine-layer maze on the grounds of a Venetian doge's playground.

The largest ice cave in the world is thought to be the entrance to hell according to Austrian legend.

A sunken idol welcomes parishioners to Davy Jones' Locker.

The bomb-ravaged remains of of a colossal Neptune.

A factory director designed what was the world's longest suspension footbridge in 1923 so his employees could get to work safely.

This Tuscan lake hides a 13th century town that is still visible when the water recedes.

Ham is serious business at the Prosciutto Museum-Serious, delicious business.

A floating bridge leaning on barges allows pedestrians to reach the historical center.

The world's oldest surviving anatomical theater, where "the dead are pleased to help the living."

These caves are home to a small church and were used to age cheese.

A stunning hermit's shrine on a steep rocky spur in Northern Italy.