Oppidum Třísov, Celtic oppidum in Třísov, Czech Republic

Oppidum Třísov is a Celtic hillfort above the Vltava, enclosed by two lines of earthen ramparts with a stone facing. The inner rampart is about 7 m wide, and between the two lines lies a 15–20 m ditch crossed by low stone walls. The site has two acropolises, north and south.

The site was settled by Celts in the mid-2nd century BC without fortifications; around 120 BC two ramparts with a stone facing were built. At its height in the 1st century BC the enclosed area covered 26 hectares. Around the turn of the era the inhabitants abandoned it and carried off nearly all their possessions during the expansion of Germanic tribes.

The site's name comes from the village of Třísov in the municipality of Holubov. Its potters fired graphite-tempered ware in vertical kilns with a grate; this tuhová keramika makes up three quarters of the pottery fragments found and was the main export good, formed into containers for Alpine salt.

The site is accessible via a walking path with information boards that explain the settlement, its fortifications, and the lives of its inhabitants. The ascent is moderate, but visitors should expect uneven terrain and varying light conditions in the forested area.

Between the two rampart lines lies a 15–20 m wide ditch crossed by low stone walls set at intervals, blocking sideways movement of attackers. The regularly alternating ridges and grooves are still visible in the terrain and are exceptional in Bohemia.