A small western part of the municipal territory extends into the Bohemian Forest Foothills and includes the highest point of Vodňany, the hill Svobodná hora at 640 m (2,100 ft) above sea level.

Originally, the mining of precious metals was also planned, but it was never fully developed, and the town's orientation towards pond farming became much more profitable.

A common carp bred in this town called "Omega3kapr" is healthier thanks to special feed and breeding conditions and is a registered trademark.

[7] The I/20 road (part of the European route E49) from České Budějovice to Plzeň and Karlovy Vary passes through the municipal territory.

In 2009, the institute became a part of Faculty of Fisheries and Protection of Waters of University of South Bohemia in České Budějovice.

[3] The most valuable building of Vodňany and the main landmark of the town square is the Church of the Nativity of the Virgin Mary.