The main reason for the building of the railway from Linz to České Budějovice was the transport of salt from Salzburg to Bohemia.

Aquatic work consists since 1960 of two dams, artificial water reservoirs and two hydro plants called Lipno I and Lipno II. This work was built mostly for water and energy purposes. Aim of construction was utilization of 160m slopeas source of top and controllable electric energy.

Isolated forest with a small pit, quarry 0.5 km west of the village Muckov, 2.5 km east of the Black community in the drab Černá v Pošumaví hill, which is a few meters a powerful cartridge granulated limestone and dolomite limestone.

The thought of connecting the Vltava river with the Dunaj river, the flow of two rivers which lead into different seas, came about in the middle of the 14th century, during the reign of emperor Karel IV. The actualisation of this project only came towards the 18th century.