Cycling
This is an amazing area for cycling whether your tarmac terror or prefer to get off road. There is also one of the UK's few Velodromes at Newport just 30 mins drive
http://www.mtbbreconbeacons.co.uk/
http://www.cyclebreconbeacons.com/en/contactus_map.html
Walking
You can actually walk out of the house onto the hills and at the end of the day you can sit back and gaze at the black mountains picking your next day's trip.
HorseridingThis is superb riding country with most local stables offering a range of hacks and lessons.
Fishing5 minutes away from the river Usk.
Brecon Beacons National ParkFor a full overview of activities within the park please click here.