Biržai Regional Park
| Biržai Regional Park | |
|---|---|
Sinkhole formed in 2004 | |
Map of Lithuania | |
| Location | Panevėžys County, Lithuania |
| Nearest city | Biržai |
| Coordinates | 56°12′04″N 24°39′32″E / 56.201°N 24.659°E |
| Area | 14,659 hectares (36,220 acres) |
| Established | 1992 |
Biržai Regional Park covers 14,659 hectares (36,220 acres) in northern Lithuania near its border with Latvia. It was established in 1992 to preserve a distinctive karst landscape. About 20% of its area is covered by forest.
The park is notable for its sinkholes, created by the dissolution of the gypsum underlying its soil. About 9,000 sinkholes have been identified; the most notable is the Karvės ola (Cow's Cave), which is about 20 meters deep. In 1998 the use of pesticides and fertilizers in the area was restricted.