Dlouhá Stoka is an important technical monument running through a large part of Slavkov Forest.
It was built in 1536 because mining activities required ever more water to power machinery and equipment, while timber supplies around Horní Slavkov and Krásno were steadily diminishing. Wood therefore had to be transported to the mining operations from the distant Kynžvart forests. The route was called Flossgraben.
Flossgraben represented a highly purposeful and carefully planned intervention in the natural water regime. Given the terrain, the project depended primarily on precise surveying and maintaining a minimal gradient, ensuring that water could successfully be brought to the required elevation and fulfilling the purpose of the entire undertaking. The total length of the water channel was 24.2 kilometres. Dlouhá Stoka has been a cultural monument since 2003.
