Learn Turkish: Otelde büyük bir yatak var. - There is a large bed in the hotel.

In Turkish, words that express existence like var (there is/are) usually go at the end of the sentence. The standard pattern is to put the location first, then the thing that exists, and finally var.

Why is the word order büyük bir yatak instead of bir büyük yatak?

In Turkish, when you use an adjective with bir (a/an), the word bir must come between the adjective and the noun. So 'a large bed' translates literally to 'large a bed' (büyük bir yatak).

What does the -de in otelde do?

The suffix -de is the location marker meaning 'in', 'on', or 'at'. When you use var to say something exists somewhere, you usually need this suffix on the place word. Here, it turns otel (hotel) into otelde (in the hotel).

Does var change if we want to say 'there are' multiple beds?

No, var stays exactly the same whether you are talking about one thing or many things. It works perfectly for both 'there is' and 'there are'.