The following nouns expressing locations are often used with a possessive suffix to indicate location.

back, rear	arka
its back	arkası
at its back /behind it	arkasında
Stay behind me.	Arkamda kal.
Look behind you.	Arkana bak.

front	ön
its front	önü
at its front / in front of it	önünde
Wait in front of the hotel.	Otelin önünde bekleyin.

side	yan
its side	yanı
at its side / beside it	yanında
Come beside me.	Yanıma gel.
Stay by my side.	Yanımda kal.
Go from my side.	Yanımdan git.

space between	ara
its space between	arası
at its space between / between / among	arasında
I am sitting between the trees.	Ağaçların arasında oturuyorum.

bottom	alt
its bottom	altı
at its bottom / under(neath) it	altında
The cat is sleeping under the table.	Kedi masanın altında uyuyor.

top	üst
its top	üstü
at its top / on top of it	üstünde
The book is on top of the shelf.	Kitap rafın üstünde.

We will always translate on top of with üstünde, and we will always translate on with the locative suffix DE. However, in practice on can be translated both by üstünde and by the locative suffix DE.

Usages of üst