Before the outbreak of the Covid-19 Pandemic, I spent a few days in my hometown Linz, Austria, to visit old friends and take photos. One of these photo spots was the abandoned Limonitunnel. It’s a huge tunnel under a hill used as an air-raid shelter during World War II.

History of the Limonitunnel

Austria, which was annexed by Germany in 1938, was out of range of allied bombers until 1943. That changed once the allies occupied Italy. Suddenly, Austria was in the range of allied bombers. So the Germans ordered to build an air-raid shelter in Linz by connecting various century-old wine- and beer-cellars located inside a hill in Linz.

Former wine cellar at the Limonitunnel

The resulting bunker should provide protection for more than 20.000 people and is known as the Limonitunnel (“Limonistollen” in German).

Know before you go

You can visit the Limonitunnel through guided tours that you can book via the homepage of the Limonitunnel. The tunnel is located here:

But don’t bother going there without a guided tour. The area is under CCTV surveillance.

Good to know Urbex and guided underground tours change over time. I do not check whether tours are still offered in the same format as when I visited. Please check the organizer’s website at the bottom of this page for current tour schedules.
Historical Timeline & Key Milestones
18th–19th Century
Origins as Beer and Wine Cellars
Local breweries and vintners excavated deep sandstone vaults into Linz’s Bauernberg hill for cool, year-round storage of perishable goods.
1943
Air-Raid Bunker Directive
As Allied bombers reached Upper Austria from southern Europe, Nazi authorities ordered the subterranean cellars expanded into an interconnected air-raid shelter network.
1944
Forced Labor Expansion
Thousands of forced laborers and concentration camp prisoners from Mauthausen were subjected to brutal labor to hollow out over two miles of underground tunnels.
1945
Civilian Shelter During Allied Bombings
The bunker complex, designated as the Limonistollen, sheltered more than 20,000 citizens during heavy bombardment in the closing stages of the war.
1990s–Present
Subterranean Preservation & Tours
After decades of abandonment and closure, dedicated local historians restored access to educate the public through guided historical tours.

Photographing inside the tunnel

Though the tunnel is partially electrified, I found a few spots that weren’t, and so I used a technique that I described in a separate blogpost: how to take photos in total darkness with iPhone.

The tunnel itself is huge and in some areas up to 10 feet high.

The Limonitunnel ist quite. huge in some areas

During your tour, you’ll also see the remains of the old airflow system

Remains of the old air flow system at the Limonitunnel

When I was young, I knew someone who owned a part of the tunnel and provided a personal tour. I remember seeing some machines from World War II stuck in the rocks and a few rooms where the forced laborers had to sleep. I bet you can imagine where these forced laborers came from.

Speaking of unfinished parts: here’s such a tunnel that was never finished and that you’ll see during your tour.

Unfinished tunnel

Summary

On the one hand, visiting the former air-raid shelter is an interesting experience, but on the other hand also depressing. You’ll hear about the forced laborers from Mauthausen that had to work in the tunnels and maybe a few stories about the air raids. If you decide to visit the Limoitunnel, make sure to bring warm clothes. You’ll get a flashlight from the guides. But if you want to bring your own, you may want one to have a look at the flashlights that I use for exploring places like these: Read my Olight S30R review or, if you’re looking for a smaller flashlight, the review of the Olight S1R.

By the way: In the evening on the same day, I photographed a firework. So of you’re curious, read the tutorial about how to photograph fireworks with iPhone.