Algar do Carvao Natural Reserve cave, Island of Terceira, Azores, Portugal, Atlantic, Europe

photography colour colour image color color image horizontal horizontal image background people incidental people people in the background travel travel destination travel destinations underground tourist tourists holiday maker holiday makers on holiday tourism algar do carvao natural reserve cave terceira azores portugal portuguese atlantic europe european geological feature rock rock formation illuminated lit lit up subterranean cavern low angle view low angle stairs stairway diminishing perspective vanishing point perspective