How is Mr. Heathcliff's estate described in Chapter 1? Where is this estate in relation to Thrushcross Grange?

Mr. Heathcliff’s estate is called Wuthering Heights, and it lies next to the moors. Wuthering Heights is four miles from Thrushcross Grange. Above the entrance to the house is scratched the name Hareton Earnshaw and the date 1500.