Tapolca (Hungarian: ['tɒpolt͡sɒ]; German: Toppoltz) is a town in Veszprém County, Hungary, close to Lake Balaton.

This 3 km long lake cave system is situated in the heart of the town.

At 15–20 m below the town, a 5 km long cave system criss-crosses the Miocene limestone layers.

Dripstones have not developed in the cave, as several metre thick clay deposits prevents infiltration from the surface.

The Upper Pond can be reached from the Main Square through a small backyard where the "Four Seasons", a sculpture by László Marton, is situated.

[2] The former marketplace of the town, the Main Square, functioned as a trade centre from ancient times.