driessouvereyns's User Profile - Atlas Obscura
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Rome, Italy

Vicus Caprarius

A forgotten "city of water" underneath the famous Trevi district.
Riola, Italy

Rocchetta Mattei

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

The Catacombs of San Sebastian

Jesus' footprints and the first catacombs in the world.
Venice, Italy

San Servolo Insane Asylum Museum

Venice's "Island of the Mad."
Saturnia, Italy

Terme di Saturnia

Geothermal waterfalls in Tuscany.
Rome, Italy

Parco degli Acquedotti

This beautiful park on the outskirts of Rome protects the ruins of two colossal ancient aqueducts.
Italy

Carezza Rainbow Lake

According to the local folklore, the myriad colors of this lake are the result of a lovelorn wizard's blunder.
Rome, Italy

Pyramid of Cestius

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.
Rome, Italy

The Dome Illusion

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.
Rome, Italy

Quartiere Coppedè

Architectureal fantasy quarter of Rome.
Bomarzo, Italy

The Monsters of Bomarzo

A 16th-century horror show built in a lovely Italian garden.
Rome, Italy

Galleria Sciarra

This hidden Art Nouveau courtyard is an opulent feast for the eyes.
Sorrento, Italy

Valle dei Mulini (Valley of the Mills)

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.
Itter, Austria

Castle Itter

German and American troops joined forces to defend this fortress during the strangest battle of World War II.
Zwentendorf, Austria

Zwentendorf Nuclear Power Plant

Austria's very first and only nuclear power station was completed but never used.
Salzburg, Austria

Almkanal of Salzburg

The medieval network of canals hidden underneath the city is opened to explorers each year.
Graz, Austria

Burgruine Gösting (Gösting Castle Ruins)

The shell of a medieval fortress offers commanding views of the area it once protected.
Hinterbrühl, Austria

Seegrotte

This series of underground chambers contains Europe's largest subterranean lake that is slowly drained each day.
Tal, Austria

Green Lake

Each year melting snow turns these Austrian hiking trails into scuba zones.
Tarrenz, Austria

Starkenberger Beer Pools

Where beer lovers can literally immerse themselves in beer.
Werfen, Austria

Eisriesenwelt

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

Riegersburg Castle

A centuries old castle atop a dormant volcano houses museums devoted to both women and witches.
Zermatt, Switzerland

Evolver

Spiral alpine structure provides an alternative experience of viewing the Matterhorn.
Geneva, Switzerland

Immeuble Clarté

An early masterpiece of Le Corbusier, a famed Modernist architect, hiding in plain sight.