Wittenham Clumps are located at grid reference , close to the River Thames, and good views can be had from the Thames Path along the river. The panoramic views of the Berkshire and Oxfordshire countryside from the Clumps themselves are also spectacular; a viewpoint guide on the north side of Round Hill gives directions to many sights, the furthest being Faringdon Folly, a tower built on another Iron Age hillfort to the west. Day's Lock and Dorchester Abbey are clearly visible in the valley to the north, with the 15-storey Plowman Tower in Northway, Oxford visible on the horizon, away. The white-walled reactor buildings of the Joint European Torus, site of the world's first successful controlled nuclear fusion experiments, can be seen around 6 km to the north-west. To the west, there is the town of Didcot, with some of the chimneys of the gas-fired Didcot B Power Station visible. Formerly, the cooling towers of Didcot A Power Station, constructed in the late 1960s, dominated the skyline around Didcot; they were demolished in phases from 2014 to 2020. To the north-east is Little Wittenham Wood, which borders the Thames, and to the south-east is Brightwell Barrow.