There is a small wonder of the world in the Bohemian Forest - the Schwarzenberg canal. Forestry engineer Josef Rosenauer had the idea of transporting wood from the Bohemian Forest to Vienna and this was made possible by the construction of the Schwarzenberg canal. The Schwarzenberg canal is a timber canal over 50 kilometers long that was built in the 18th century and used commercially until the 20th century. Beautifully designed border crossing, worth seeing.
Nice path along the Schwarzenberský Plavební Kanál. The canal is only a small groove, but the path is nice for cycling. Small border crossing at the Igelbach crossing. More information: de.wikipedia.org/wiki/Schwarzenbergscher_Schwemmkanal