What's this?
a mountain
What's this?
a hill
What's this?
a forest
What's this?
a valley
What's this?
a lake
What's this?
a cliff
What's this?
an island
What's this?
a beach
What's this?
the sea/ the ocean
What's this?
a tunnel
What's this?
a bridge
What's this?
a canal
What's this?
a river
What's this?
a brook
What's this?
a skyscraper
What's this?
a power station
