The underground cellars in Mendig are among the largest basalt lava tunnels in the world.
Basalt from these mines was historically prized for high-quality millstones exported globally.
The cellars were used for decades as natural cold storage for local breweries due to the consistent climate.
The Laacher See volcano, near the museum, remains geologically active with potential for future seismic events.
The museum uses 'Lava-Power' exhibits to explain the extraction of volcanic rock throughout history.
The Lava Dome in Mendig serves as the interactive visitor center for the Laacher See volcanic region. The museum explains the geological development of the Eifel mountains through high-tech media displays and simulations. Visitors descend into the historic Mendig basalt lava cellars, which span over three square kilometers underground. These cellars were carved by miners extracting basalt for millstones, creating a stable, cool environment. The underground tunnels maintain a constant temperature of approximately 8 degrees Celsius year-round. The exhibition focuses on the interaction between tectonic shifts and volcanic activity in the region. It features a mock-volcanic eruption chamber designed to demonstrate seismic forces. The site connects directly to the subterranean labyrinth beneath the town of Mendig.
The entrance to the historic basalt cellar tunnels, featuring illuminated rock walls.
Bring a warm jacket, as the underground lava cellars remain significantly colder than the surface temperature.
Wear sturdy, closed-toe walking shoes to navigate the uneven basalt floors in the underground section.
Check the official website for guided tour availability, as parts of the cellars require a reservation.
Do not attempt to explore the non-guided sections of the cellar network, as the layout is complex and lacks public signage.
Closed on Mondays during the off-season; check the website for seasonal holiday closures.
Maintain a quiet volume in the underground tunnels, as sound carries significantly in the basalt chambers.
