MaesHowe is a chambered tomb and is more than 5,000 years old. Unfortunately, it was raining heavily when we visited the place and we couldn't take any pictures.This is another paid attraction and you can purchase the tickets from the Tormiston Mill situated just a short walk from the site. This is a guided tour and I think there are restrictions on the number of the people entering the tomb at a time as it's quite small. Although the temperature was hovering around 5 degree Celsius outside, it was pretty warm inside the tomb. You can find more information on opening times and tickets here.Scapa Flow MuseumScapa Flow Museum is located on Lyness on the Island of Hoy. We took a short ferry from Houton. The visitor centre and the Museum is located just off the ferry port and is easily accessible. It is all about the naval anchorage in the First and Second World wars. There are a lot of photographs, artefacts and an audio exhibition. It also has a large collection of military vehicles, cranes and artillery exhibited on the museum grounds.Admission to the Museum is free. It has a gift shop and a cafe. More on opening times here.