It is on the edge of the North York Moors National Park at 460 feet (140 m), and about six miles (9.7 km) north-east of Thirsk.[2] Ravensthorpe Manor House, built in the mid 19th century, is situate 0.5 miles (0.8 km) west of the village.[citation needed] The eastern part of the Boltby was affected by flooding in 2005 when Gurtof Beck overflowed and damaged or destroyed buildings.[10] About 1.0 mile (1.6 km) south of the village and to the immediate north-west of Tang Hall Farm[11] (also known as Ravensthorpe Mill), is the site of the mediaeval moated castle or fortified manor house[12] of Ravensthorpe,[11] listed three times as a subsidiary manor in the Domesday Book of 1086, as Ravenestorp and Ravenetorp.Romanby's water flowed through a pipe laid alongside the railway line from Thirsk and was supplied separately from the remainder of Northallerton for many years.Supply ceased to be drawn from the reservoir and operation / ownership was involuntarily transferred to Ryedale Joint Water Board.