Graži vieta, Klaipėdos apskritis
This WWII coastal battery bunker near Klaipėda is rated 4.7★ from 1,200+ reviews. It's only open for brief windows on weekends (roughly 12-12:30pm and 2-2:30pm, likely guided-visit slots) - pajuris.info, phone (0-630) 20263.