Therfield Heath is a public open space and nature reserve

Nature reserve

A nature reserve is a protected area of importance for wildlife, flora, fauna or features of geological or other special interest, which is reserved and managed for conservation and to provide special opportunities for study or research...

 on the chalk escarpment just north of Therfield

Therfield

Therfield is both a small village of approximately 4,761 acres and a civil parish which sits upon the chalk range, three miles southwest of Royston, and six miles northeast of Baldock) and within the English county of Hertfordshire.-Ancient history:The name Therfield is a variation of Tharfield...

, Hertfordshire

Hertfordshire

Hertfordshire is a ceremonial and non-metropolitan county in the East region of England. The county town is Hertford.The county is one of the Home Counties and lies inland, bordered by Greater London , Buckinghamshire , Bedfordshire , Cambridgeshire and...

; since it lies south-west of the town of Royston

Royston, Hertfordshire

Royston is a town and civil parish in the District of North Hertfordshire and county of Hertfordshire in England.It is situated on the Greenwich Meridian, which brushes the towns western boundary, and at the northernmost apex of the county on the same latitude of towns such as Milton Keynes and...

 it is also known locally as Royston Heath. It has a testing racetrack for horses on its slopes and is a popular spot with dog walkers and birdwatchers

Birdwatching

Birdwatching or birding is the observation of birds as a recreational activity. It can be done with the naked eye, through a visual enhancement device like binoculars and telescopes, or by listening for bird sounds. Birding often involves a significant auditory component, as many bird species are...

. The Heath is a common

Common land

Common land is land owned collectively or by one person, but over which other people have certain traditional rights, such as to allow their livestock to graze upon it, to collect firewood, or to cut turf for fuel...

 on which sheep are still regularly grazed.

The site offers very good views towards the north, over the valley of the Cam

River Cam

The River Cam is a tributary of the River Great Ouse in the east of England. The two rivers join to the south of Ely at Pope's Corner. The Great Ouse connects the Cam to England's canal system and to the North Sea at King's Lynn...

 as far as Cambridge.