A group of wounded servicemen from the charity Walking With The Wounded scaled Mount Snowdon last night to light one of four flames at the UK's peaks.
Beacon chains have a long history in the UK, and were put together to celebrate Queen Victoria's Diamond Jubilee in 1897, as well as the Silver and Golden Jubilees in 1977 and 2002.
Dame Shirley Bassey and Sir Tom Jones flew the flag for Wales at last night's Jubilee Concert outside Buckingham Palace.
Last night saw around 200 beacons lit across Wales to mark the Queen's Diamond Jubilee.
From the Menai Bridge to Newport and Pen y Fan, hundreds of people turned up to see them being ignited.
A group of injured former servicemen are scaling Snowdon this evening, to light a Diamond Jubilee beacon at its summit.
Captain David Wiseman, part of the Walking With The Wounded team, told us it would be a "huge honour" to take part. It's hoped 2,012 flames will be ignited in sequence around the UK between 10 and 10.30pm.
Diamond Jubilee celebrations are continuing today, with plenty more street parties taking place across Wales. Our reporter Rob Osborne visited one party in Llantwit Fardre, where local residents told him they were drumming up some good old-fashioned community spirit.