What's this?
It's a lift.
What's this?
It's a village.
What's this?
It's a city.
What's this?
It's a balcony.
What's this?
It's a house.
What's this?
upstairs.
What's this?
downstairs
What's this?
It's a town.
What are these?
They're stairs.
What's this?
It's a flat/ an apartment.
What's this?
It's a basement.