DiscoverPlaces to seeNatural MonumentsGermanyRhineland-PalatinateAhrweilerGlees
Delius Tunnel entrance at Laacher See
DiscoverPlaces to seeNatural MonumentsGermanyRhineland-PalatinateAhrweilerGlees
Delius Tunnel entrance at Laacher See
Highlight • Structure
Delius Tunnel entrance at Laacher See
Hiking
4.3
(254)
Mountain biking
4.2
(55)
Cycling
4.4
(34)
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Rhein-Ahr-Eifel
Tips
Klausi
March 15, 2025
Hiking
On January 20, 1820, Daniel Heinrich Delius, the President of the Trier government, acquired the monastery estate of Laach Abbey. Between 1840 and 1845, his descendants, the Delius and von Ammon families, as owners of the monastery estate and the lake, had a new Delius tunnel built approximately 5 meters lower and approximately 1,070 meters long, with the older Fulbert tunnel partially filled with the new excavated material.
This reduced the lake's surface area by approximately 48 hectares, and the agriculturally usable area was significantly increased.
Source: Display board
This reduced the lake's surface area by approximately 48 hectares, and the agriculturally usable area was significantly increased.
Source: Display board
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42x7
August 7, 2017
Hiking
Here a drainage tunnel was built around 1840 for the Laacher See to increase the usable agricultural area. Already in the 12th century there was such a tunnel, which lowered the lake level by 5 m. A medieval masterpiece! (see picture)
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Nordhesse
December 5, 2020
Hiking
The mouth of the Delius tunnel is only a few meters away from the circular lake path and is a worthwhile destination. The tunnel is explained on an information board, along with lots of information about the geological structure of the region. The mouth tunnel offers an interesting photo opportunity.
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Details
Informations
Elevation 340 m
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Monday 10 August
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Max wind speed: 14.0 km/h
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