
Biržai Regional Park offers karst sinkholes, forested trails, meandering rivers and the moated 17th‑century Biržai Castle — a mix of dramatic geology and historical architecture. Best at sunrise/sunset for warm light and reflections on lakes; spring/autumn show color and mist. Park is accessible by car; parking near visitor areas in Biržai town. No special permits for casual photography; check weather for muddy trails. Weekdays are quieter.

Biržai Regional Park offers karst sinkholes, forested trails, meandering rivers and the moated 17th‑century Biržai Castle — a mix of dramatic geology and historical architecture. Best at sunrise/sunset for warm light and reflections on lakes; spring/autumn show color and mist. Park is accessible by car; parking near visitor areas in Biržai town. No special permits for casual photography; check weather for muddy trails. Weekdays are quieter.