Looking Up At The Volcanic Vent Of Algar do Carvao In The Island Of Terceira, Portugal

looking up volcanic vent algar do carvao island terceira portugal ancient lava tube portuguese archipelago azores fern moss growing vegetation green verdant landscape volcanic vent volcano volcanic cave environment nature travel attraction cave scenic inside lava tube tourism outdoor terceira azores plant cavern background summer foliage leaves vulcanic cone travel destinations destination crater lush europe lave tube park