artique	aurore boréale
Bryce canyon	faille St Andreas
polder	geyser 1
geyser 2	devil's marble
iles Ihuru	irrigation Egypte
rizière Philippines	sols polygonaux
volcan	orage
meteor crater	pingo
Koryakski	Chutes Victoria
Himalaya	Rainbow Bridge
Cheminée de fée	Cappadoce
Shiprock	Rocher champignon