High Willhays hard to explain. High Willhays is near the northwestern edge of Dartmoor, about south east of Meldon Reservoir and about south of the town of Okehampton. Although it is the highest point of the moor, it is relatively insignificant in comparison to most of the moor's tors, consisting of no more than a few low outcrops of rock along a north-south ridge. The largest outcrop is crowned with a cairn. The more impressive, but slightly lower, Yes Tor is about north along this ridge, which is known as "the roof of Devon". High Willhays and Yes Tor are the only
County of London Government Act 1963 replaced the county with the much larger Greater London administrative area. The county occupied an area of just under and lay within the London Basin. It was divided into two parts (north and south) by the River Thames, which was the most significant geographic feature. It was bordered by Essex to the north-east, Kent to the south-east, Surrey the south-west and Middlesex to the north. The highest point was Hampstead Heath in the north of the county at , which is one of the highest points in London. In 1900 a number of boundary anomalies were abolished.