From Sahih Bukhari (Hadith 6521):
Narrated Sahl bin Sa`d:I heard the Prophet (ﷺ) saying, "The people will be gathered on the Day of Resurrection on reddish white land like a pure loaf of bread (made of pure fine flour)." Sahl added: That land will have no landmarks for anybody (to make use of)
Reference: Bukhari 6521