Birkhall ( BerkHA ; from the Scots Birk Haugh : `` Birch River-meadow '' ( 1 ) ) is a 53,000 acre ( 210 kmÂ ) estate on Royal Deeside , Aberdeenshire , Scotland . Birkhall ( BerkHA ; from the Scots Birk Haugh : `` Birch River-meadow '' ) is a 53,000 acre ( 210 kmÂ ) estate on Royal Deeside , Aberdeenshire , Scotland .