With an average flow of approximately 8,600 liters per second, it is the most productive spring in Germany. The water originates from the Danube seepage basin in the northern part of the Aach River basin and feeds the Radolfzell Aach, which flows into Lake Constance approximately 32 kilometers between Moos and Radolfzell.

For many years, the hydropower was used for production by the Schiesser factories in Volkertshausen and Rielasingen.

Translated by

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Juschu ( Jürgen & Vicky)

September 21, 2025

Hiking

The Aachquelle is the largest spring in Germany.

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Natalo

August 27, 2017

Mountain biking

Not far from Lake Constance lies the small town of Aach, the largest spring in Germany! It is not called Aachquelle, but 'Aachtopf' - although pot is a little understated for the small pond, which is permeated by diverse source flow.
On average, about 9000 liters of water bubble out of the depths into the sunlight every minute (on very good days that can be more than 20,000 liters !!!)

If you want to experience nature up close, this is the place for you!

Please do not bathe in the 'Aachtopf' !!
spiegel.de/wissenschaft/natur/aachhoehle-erstmals-hoehlenfisch-in-europa-gefunden-a-1141659.html

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Routes here

Top cycling routes to Aachtopf (Aach Spring)

4.3

(31)

122

riders

1. Geotour in the Donaubergland

49.7km

03:22

690m

Hard bike ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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Hard

4.7

(23)

127

riders

2. Überlingen Old Town – Ludwigshafen Marina loop from Überlingen

61.4km

03:43

360m

Moderate bike ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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Moderate

4.7

(170)

638

riders

3. Aachtopf (Aach Spring) – View of Hohentwiel loop from Markelfingen

67.2km

04:04

200m

Moderate bike ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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Moderate

Details

Informations

Elevation 480 m

Weather

Tuesday 27 January

4°C

1°C

95 %

Additional weather tips

Max wind speed: 5.0 km/h

Most visited during

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Location: Freiburg District, Baden-Württemberg, Germany

Other Popular Places to Check Out

View of the Hegau Mountains: Hohentwiel, Hohenkrähen, Mägdeberg

Scenic Route Between Honsliten and Engent

Panorama Lounger With View of the Hegau Volcanoes

St. Bartholomew's Church and Weir in Beuren an der Aach

Jägermühle Inn at the Aach Spring

View of Aach

View of Mägdeberg and Hohenstoffeln

View of Hohenkrähen

View of Langenstein Village and Church

Krebsbachtal

A81 Bridge at Hohentwiel

Bridge Path Over the Aach

Aachtopf (Aach Spring)

1. Geotour in the Donaubergland

2. Überlingen Old Town – Ludwigshafen Marina loop from Überlingen

3. Aachtopf (Aach Spring) – View of Hohentwiel loop from Markelfingen

Other Popular Places to Check Out

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