Hikers on path along levada (aqueduct) of Green Cauldron (Caldeirao Verde), Madeira island, Atlantic Ocean, Portugal

hikers path levada aqueduct caldeirao verde madeira lush greenery ferns nature atlantic outdoor adventure trekking scenery walking travel exploration forest landscape holidays mountains trails portugal island wilderness serene environment water hiking lushness flora fauna fresh air scenic route expedition tourism biodiversity health peaceful summer journey exercise mediterranean green explore trail