Nantyffyllon sits on the banks of the river Llynfi, north of Maesteg in South Wales. The Llynfi flows down the valley through Maesteg before its confluence with the rivers Ogmore and Garw at Aberkenfig.

The village sits between Mynydd Bach, 433m, to the east, and the Afan Country Park, named in the 'What Mountain Bike Magazine' as one of the top ten places in the world to “ride before you die”. There are five mountain bike trails, including Penhydd Trail, The Wall Trail, White's Level Trail, Skyline Trail and the W2 Trail. There are nine waymarked walking trails, which range from 3-4 hour trails to a shorter 30 minute walk. Not only are there marked trails, but the 25 miles of disused railway lines, known as the Family Routes or Low Level Cycleway, also make excellent ways for cycling and walking. A wildlife puzzle trail is held annually in the park, and is a huge success with children.

Don't worry if you have no interest in bikes or don't fancy walking around the park. A 300 seat outdoor theatre was introduced to Afan in 2006 and hosts many music and drama productions, as well as art workshops.

Nantyffyllon Rugby Football Club is a member of the Welsh Rugby Union and is a feeder club for the Ospreys. The club fields a senior team which plays in the WRU leagues, and also fields a second XV, youth and junior teams.