The lake is fed by an underground karst cave system that spans nearly 20 kilometers beneath Tapolca.
The water temperature remains stable even in winter, preventing the surface from freezing.
Water flowing from the pond powers the local mill stream, which eventually joins the Marcal River.
The Mediterranean appearance of the buildings surrounding the pond was heavily influenced by reconstruction efforts in the mid-20th century.
A local legend suggests the water has healing properties, though the site is primarily geological in nature.
Malom-tó (Mill Pond) is a spring-fed lake located in the center of Tapolca, Hungary, unique for maintaining a constant water temperature of 18-20°C year-round. The water originates from a vast karst cave system beneath the town, eventually feeding into the pond and the nearby Tapolca stream. Historically, the pond powered local mills, one of which is now integrated into a hotel complex. The surrounding area features Mediterranean-style architecture, including colorful houses built directly at the water's edge. Wooden walkways and landscaped promenades encircle the pond, providing pedestrian access to the water's surface. The site is famous for its crystal-clear, emerald-green water, which is visible to depths of several meters.
From the wooden bridge overlooking the pond with the colorful, old-fashioned houses and the mill wheel in the background.
Walk the entire perimeter of the pond to see the water from different angles, including the hidden nooks behind the mill buildings.
Look down into the water from the stone bridges; the visibility often allows you to see schools of fish clearly.
Visit the nearby entrance to the Lake Cave (tavasbarlang) for an underground boat tour that connects to this spring system.
Do not attempt to feed the large fish or swim in the pond, as the ecosystem is protected.
