Birzai Regional Park is a national park in Lithuania known for its stunning karst landscape. It features over 9000 sinkholes, including the famous Cow's Cave, which is 12.6 meters deep and has an interesting history.

Birzai Castle is a historical structure built in the late 16th century. It features large white-washed bastions and houses exhibitions on local culture and military history.

Cow Cave is a natural cave located in Birzai, Lithuania. It is known for its unique rock formations and beautiful surroundings, making it an interesting spot for nature lovers and explorers.

Astravas Manor is a historic estate built between 1849 and 1862. It features neoclassical architecture and scenic views of Lake Širvėna.

Sodeliskiu Manor is a historic estate located in Birzai, Lithuania. It features beautiful architecture and lush gardens, making it a popular spot for visitors and locals alike.