There are only two Lancaster Bombers left from the WWII Dambuster raids.
One lives in the UK, the other lives in Canada, which means it is not only rare to see one of them, it's even rarer to see them both together.
But today they came to Cumbria to celebrate a very special birthday.
Archie Johnstone from Grange-over-Sands, was a navigator in 617 Squadron of the RAF, which has become known as the famous Dam Busters squadron.
His son, Robert Johnstone, had organised a fly past of his nursing home on his 100th Birthday on 7th September but he died in April at the age of 99.
The fly past was moved to Brockhole Visitor Centre, where Archie and Robert, who lives in Lancaster, would often come for days out. It became a tribute to a hero.
Hundreds of people came to the National Park's Brockhole visitor centre to watch the famous planes fly and soak in the sun.
There were 1940s-themed games and historical scenes from the frontline and the home front.