The Baltic Caves
In fact eastern shoreline of Baltic Sea is purely sandy with some stones maybe, but not any rocks or caves for sure. But if you search properly, you can still find something quite similar.
Those are concrete remains of old Tsar fortifications nearby Liepaja, Latvia.
A bit of long exposure and nice sun flare for more interesting view
Enjoy the scenery!
https://steemit.com/landscapephotography/@axeman/the-baltic-caves
Nice little window into the unknown:)....