Kirkilai Observation Tower



In the region full of sinkholes, this area is unique because of the highest density of sinkholes (more than 200 items per sq. km) and in particular circular lakelets. A circular lake indicates that the lake evolved from a collapsed sinkhole. When a sinkhole collapsed to expose the water table at the surface, the sinkhole was filled with water forming a small circular lake. A footpath runs across area making it possible to have a close look at these exceptional water bodies. This is one of two habitats in Europe where green sulphur bacteria (GSB) and purple sulphur bacteria (PSB) are present, the second one is in Italy.


In the territory of Biržai regional park, next to karst lakelets, a view tower is built; its form resembles a canoe or a sinking boat. The height of the tower is almost 32 metres. The width of the viewpoint, which is in 30 metres height, is almost 30 square metres. On the first floor there is a 27.75 sq. m. amphitheatre meant for gatherings, small events or just for relaxation.

The purpose of the view tower is to create favourable conditions to the visitors in order to acquaint them with one of the main values of the Biržai regional park – the terrain of karst ditch in Sanctuary of Kirkilai landscape. When you climb-up to the view tower, you can see wonderful views: 30 sink holes full of water. They are called the lakes of the Sanctuary of Kirkilai. Their diameter can be approximately 35 meters and more.   Some times, when certain conditions are met, in Summer the lakes can be of different colors.


Next to Kirkilai observation tower there is a special cognitive pontoon bridges walking trail. It is a perfect way to enjoy beautiful landscape of Kirkilai lakelets. The path is around 800 meters long. 

Near Kirkilai lakelets you will also find numerous benches and picknic tables, kids' playground, educational "Bug Hotel", wooden "Sound Catcher", free WiFi, and a special "Sun Eco" public service station, where you can charge your phone, inflate bike tyres and many more. 

Places of interest