noctilucent clouds over the daugava river and view to old riga town and stone bridge on july night.

blue church daugava river latvia nlc riga old town travel destinations architecture astronomy atmospheric beautiful background bright calm water city cityscape dark dawn dome dusk evening glow high lanterns light luminescence mesosphere midnight nature night nightscape people noctilucent clouds outdoors phenomena port rare reflection scenic shining silver sky space stars stone bridge summer tourism tranquil twilight weather