For more than 20 years, the musclebound firefighters of Queensland and New South Wales in Australia have been posing for annual charity calendars, raising more than $750,000 AUD (or about $680,000 USD) for the Royal Children's Hospital Burns Centre at Westmead Hospital.

The calendars, which go for about $13, also help send a team to the Firefighter Games, which we understand is sort of like the Olympics for smoke-eaters. Actually, we think we'd rather watch that than the real Olympics.

Check out more photos below, then order a New South Wales firefighter calendar here, and the Queensland calendar here.