What is this?
pond
What is this?
strait
What is this?
cliff
What is this?
volcano
What is this?
canal
What is this?
waterfall
What is this?
glacier
What is this?
lake
What is this?
bay
What is this?
hill
What is this?
sand dunes
What is this?
canyon or river
What is this?
cave
What is this?
mountain
What is this?
isthmus
What is this?
harbor
What is this?
valley
What is this?
river
What is this?
reservoir
What is this?
peninsula
What is this?
plain
What is this?
delta
What is this?
gulf
What is this?
plateau
What is this?
island
What is this?
wetland
What is this?
ocean