100 Euros Caves of Slovak Karst

The Slovak Karst, straddling the border with Hungary, contains the densest concentration of karst caves in Central Europe and has been a UNESCO World Heritage Site since 1995 — jointly listed with the Aggtelek Karst on the Hungarian side. Slovakia's gold commemorative program has systematically worked through its UNESCO-listed natural sites since the early 2000s, and this issue falls within that ongoing series.

Mintage for the Slovak gold commemoratives in this denomination is typically capped at 3,900 pieces, though confirmed figures for KM#153 specifically should be verified against National Bank of Slovakia release records.