In Portugal, a secluded stretch of untouched natural beauty hides at the bottom of a steep hill.

An early work of the architect Álvaro Siza Vieira, these swimming pools blend into the beach.

This fairy-tale, neo-Gothic church in the Azores is a world of magical realism.

Picturesque intersection of witchcraft and ancient Christianity.

The verdant mossy ruins of a Franciscan monastery lie in the remote Sintra hills awaiting exploration.

Perhaps the most spectacular grotto along the Algarve coastline.

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

This gaping hole in the middle of a remote mountain lake looks like a portal to another dimension.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

Home to fantastic views and ancient graves.

On the grounds of a former estate in Burgundy stands an elaborate temple that is modeled after the first Tibetan Buddhist monastery.

One of the oldest and largest wooden churches in France was very evidently constructed by shipbuilders.

Every half hour, the flow of this unusual spring cycles between a rush of water and barely a trickle.

This small island, a byproduct of 19th-century canal construction, is now home to a charming Japanese garden.

This fascinating abbey is considered the oldest monastery in the region.

The second-largest natural arch in the Chartreuse Mountains.

A fortress on this island housed the mysterious prisoner known as the "Man in the Iron Mask" for more than a decade.

The precise origins of this pink sandstone temple are unknown.

A sandstone block marks the alleged spot where the legendary writer was conceived.

Shattered columns and Egyptian pyramids outside of Paris.

Europe's largest community of crocodiles and alligators.

This small commune with an even smaller name appears to have an unlikely amount of dead ancestors.

This symbol of the French Revolution still stands where it was first planted during the 18th-century.

A suspended footbridge allows for traversing this gorge carved through the French Alps.