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- Biržai Castle & Širvėna Lake — A 16th-century island castle sitting in the middle of a long, narrow lake; great for easy strolls, photos and spotting waterfowl from the banks or the wooden bridge that links the town with the park.
- Karst sinkholes and collapse craters — The park’s signature feature: dramatic dolines and sudden ground collapses formed in limestone. They’re weird, photogenic and geologically rare in this part of Europe — many have viewing platforms and interpretation signs.
- Astravas Manor and park — A 19th-century manor across the lake from Biržai with a tree-lined park and shoreline views back to the castle; an effortless place to picnic, wander and watch the light change over the water.
- Lakes, reedbeds and birdlife — A mosaic of shallow lakes and wetlands that attract
- Biržai Castle & Širvėna Lake — A 16th-century island castle sitting in the middle of a long, narrow lake; great for easy strolls, photos and spotting waterfowl from the banks or the wooden bridge that links the town with the park.
- Karst sinkholes and collapse craters — The park’s signature feature: dramatic dolines and sudden ground collapses formed in limestone. They’re weird, photogenic and geologically rare in this part of Europe — many have viewing platforms and interpretation signs.
- Astravas Manor and park — A 19th-century manor across the lake from Biržai with a tree-lined park and shoreline views back to the castle; an effortless place to picnic, wander and watch the light change over the water.
- Lakes, reedbeds and birdlife — A mosaic of shallow lakes and wetlands that attract swans, ducks, herons and migrating species. Bring binoculars — spring and autumn migration are especially rewarding.
- Caves, springs and underground water channels — The karst landscape feeds clear springs and short underwater rivers; you’ll see where groundwater reappears and learn how surface sinkholes connect to hidden channels below.
- Marked hiking and cycling trails — A network of well-marked loops that run between forests, lakeshores and sinkhole fields. There are family-friendly short routes and longer rides for people who want to explore off the beaten track.
- Viewpoints and observation platforms — Simple wooden towers and platforms near the biggest sinkholes and lakes give surprisingly expansive views of the patchwork landscape — perfect for sunset or a quiet wildlife session.
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Hi, I’m Johan (Netherlands 🇳🇱), the creator of TakeYourBackpack. Over the past decade, I’ve backpacked through 80+ countries across six continents, gaining extensive experience with independent travel, long-term trips, and overland routes.