. "ENVO"^^ . "caldera"^^ . "A feature formed by the collapse of land following a volcanic eruption."^^ . "TGN:21409"^^ . . "ENVO:00000096"^^ . "caldera"^^ . "FTT:384"^^ . "Wikipedia:Caldera"^^ . "crater"^^ . "Geonames:T.CLDA"^^ . .