observation, tower, mediaeval, rock, indoor, stair, window, view, sunshine, windows, staircase, stairway, code, supporting structure, operating system, column, light, support, medieval, sunlight, writing, framework, step, coding system, measurement, sun, software
The Aulanko observation tower from the inside. Hämeenlinna, 2016. https://fi.wikipedia.org/wiki/Aulangon_n%C3%A4k%C3%B6torni