historic castle ruin burg zavelstein in bad teinach-zavelstein, black forest, germany with stairs of stones and foliage.

zavelstein foliage historic ruin landmark ruined castle autumn colorful forest ancient architecture bad teinach-zavelstein beautiful black forest blue blue sky branch building burg zavelstein castle ruin colors fall fortress germany grass harvest hike hiking history landscape leaves medieval monument nature old orange outdoor ruined castle season sky stairs steps stone stones tree trees upright view wall