The Gnoll Estate is situated to the eastern side of Neath town centre in west Glamorgan, south Wales.

Rising above Neath town centre, the grounds of a largely eighteenth-century landscape park lie in their original rural setting on the flank of the Vale of Neath, long famed for its picturesque beauty. The grounds of the estate once served Gnoll House, sadly demolished in 1957. The grounds are now owned and managed by NeathPortTalbot borough Council. The Gnoll Estate has become a major attraction for both locals and visitors.

Thelandscape of the Gnoll is exceptional for its combination of industrial and ornamental functions and for its strong visual relationship with the surrounding countryside.

The eighteenth-century landscaping was carried out over several phases, including the exceptional early 'transitional layout' by Thomas Greening, in the style of Stephen Switzer, with formal and informal elements, including the formal cascade, currently undergoing refurbishment (Feb 2009).

Later landscaping phases include an outstanding informal cascade of the 1740s in Mosshouse wood, and the later eighteenth-century follies of a rock-hewn grotto,adjacent to the water course. The Ivy Tower, however forms a prominent, and perhaps most well known landmark at the the beginning of the Neath valley, although the shell now stands in a rapidly decaying state.

Although the park's historic character has been diluted through the loss of the house and planting, many of its structural elements remain intact or have been restored or rebuilt.

Gnoll Action Group are commited to maintaining and improving the structural qualities of the Gnoll Estate in whatever way possible.