Pandiis's User Profile - Atlas Obscura
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Hallstatt, Austria

Salzwelten: The Hallstatt Salt Mine

The world's oldest known salt mine.
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.
Vienna, Austria

Vienna Sewer System

Vienna's underworld of tunnels and subterranean rivers made an iconic appearance in a 1949 Orson Welles film.
Werfen, Austria

Eisriesenwelt

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

Palmenhaus

Dine amidst exotic plants at this former royal greenhouse.
Tal, Austria

Green Lake

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

Jubiläumswarte

Located right outside of Vienna, visitors can take in expansive views of an ethereal forest.
Vienna, Austria

Schmetterlinghaus: The Imperial Butterfly Park

A tropical paradise just a short trip from the opera house is filled with beautiful winged creatures.
Police, Poland

Hydrierwerke Pölitz

This now-defunct synthetic fuel plant was once a major cog in the Nazi war machine.
Warsaw, Poland

Skarpa Ski Jump

Ruins of a late 1950s Polish ski jump ramp in the middle of the city.
gołdapski, Poland

Stańczyki Viaducts

The two abandoned overpasses are among the largest bridges in Poland.
Kętrzyn County, Poland

Bismarck Tower Ruin

This hilltop ruin is of the hundreds of stone columns built in tribute to the first German chancellor.
Warsaw, Poland

Old Town Wishing Bell

This bell stars in a tragic love tale and is said to make wishes come true.
Żagań, Poland

Stalag Luft III Prisoner Camp Museum

The site of one of the largest prison escapes of World War II.
Warsaw, Poland

Marie Curie's Tree

A tree planted by Marie Curie is treasured by the Radium institute that she set up.
Tomaszów Mazowiecki, Poland

Zakłady Włókien Chemicznych

Dubbed "Wistom" by locals, this abandoned factory is an urban explorer's dream.
Malbork, Poland

Malbork Castle

This 13th century Gothic brick castle is the largest in the world by surface area.
Nowy Dwór Mazowiecki, Poland

Modlin Fortress Granary

In northeastern Poland, the ruins of a massive granary overlook the Narew River.
Wrocław, Poland

Hydropolis

This oddly beautiful water cistern is a techno-temple to the wet stuff and a multimedia masterpiece.
Leba, Poland

Nazi Rocket Test Site

This open-air museum was originally a World War II testing ground for German missiles and rockets.
Otwock, Poland

Zofiówka Sanatorium

An abandoned Jewish sanatorium is tucked within the woods of Poland.
Walbrzych, Poland

Totenburg Mausoleum

This mysterious and once-grand memorial still embodies a remarkable architectural vision.
Gmina Leśnica, Poland

St. Annaberg Thingstätte

One of the largest amphitheaters in Europe is a former Nazi gathering place that still stands today.