Dartmoor is an area of moorland in south Devon, England. The moorland is capped with many exposed granite hilltops known as tors, providing habitats for Dartmoor wildlife. The entire area is rich in antiquities and archaeology (Wikipedia). Dartmoor was the location of the Quidditch World Cup finals in August of 1994 (GF7, GF8, GF9, Pm).
The Burrow is located only about 30 miles from Dartmoor, so the World Cup was actually held quite close to the Weasley's home. However, with magical travel being what it is, how close something is doesn't make all that much difference.