Avondhu Blackwater is located within The Blackwater Valley which contains some of the most beautiful countryside in Ireland, where rich rolling hills decline to the Blackwater River, which is the third largest river in the country. The Valley is encircled by a row of mountains on either side, stretching from West Waterford through North Cork and onward to east Kerry. The Blackwater area is layered with the antiquities, heritage and culture of the past, interspersed with rich agricultural pastures, woodland and waterways. It combines fertile lowlands, demesne woodlands and mountain ranges which feed into the River Blackwater and its many tributaries.

The landscape is also adorned with sites of archaeological interest spanning the Neolithic Age, Mesolithic Age and the Iron Age. Furthermore, there are many fine examples of Early Christian and Norman structures with many churches, castles and tower houses throughout the Blackwater area. Many of these remnants of the areas heritage and culture are still in remarkable condition, providing a fascinating history of the Blackwater Valley.