The Grassmarket No1 Apartment is located right in Grassmarket square. The castle is visible from the window. For young people or a young couple who are looking to take advantage of the night life in the centre of Edinburgh, this apartment is perfect. For a family, probably not so much. The apartment was spacious enough for two adults and one child. However, we found the apartment rather tired. There was a washer available, which was very handy for us to do some laundry.