As with many other Orkney Islands, there is a connection to the Celtic Church, possibly a pre-Norse one. There are the remains of two early churches, dedicated to St Bride and to St Columba., who are both saints of Irish origin.
The island has two lighthouses, Hoy High (NE) and Hoy Low (NW), both built in 1851 by Alan Stevenson for the 19th century herring industry.
At the Point of Oxan in the far north west, in Burra Sound, are block ships, which were scuttled deliberately during World War II. This is a common feature of the straits/former straits around Scapa Flow
The school closed in 1996 and the island's children travel daily by boat to school in Stromness on the ferry 'Graemsay.'
There is a web site run by the current residents of Hoy High Lighthouse that gives a flavour of life today on Graemsay. http://www.graemsay.org.uk/index.htm The largest building, Sandside House, has been renovated and a website describing the property and the island is also of interest. http://www.graemsay.com Former residents of Graemsay and their descendants may find the web site run by Robert Whitton at http://www.robertwhitton.eu contains information about all Graemsay families.