River Avon System

Odstock Down (grid reference SU139250) is a 12.1 hectare biological Site of Special Scientific Interest in Wiltshire, England, above the village of Odstock. It was notified in 1975.

Great Yews (grid reference SU120231) is a 29.3 hectare biological Site of Special Scientific Interest in Wiltshire, notified in 1951.

Coombe Bissett is a village and civil parish in the English county of Wiltshire in the River Ebble valley, 3 miles (4.8 km) southwest of Salisbury on the A354 road that goes south towards Blandford Forum. The parish includes the village of Homington, to the east towards the village of Odstock.

Homington and Coombe Bissett Downs (grid reference SU104245) is a 25.0 hectare biological Site of Special Scientific Interest in Wiltshire, notified in 1971. Coombe Bissett Downs is managed as a nature reserve by Wiltshire Wildlife Trust.

Odstock is a village and civil parish 3 miles (4.8 km) south of Salisbury in Wiltshire, England. The parish includes the village of Nunton with its nearby hamlet of Bodenham. The parish is in the valley of the River Ebble, which joins the Hampshire Avon near Bodenham. In the woods about Odstock are earthworks. The meaning of the name is probably "Odo's stockade".Odstock Down is a biological Site of Special Scientific Interest.

West Harnham Chalk Pit (grid reference SU128287) is a 2.8 hectare geological Site of Special Scientific Interest in Wiltshire, England, notified in 1971. Although named for the West Harnham area in the southwest of the city of Salisbury, the site lies in Netherhampton civil parish. The site is now commonly used by BMX and MTB enthusiasts as a place to exercise their skill on the many formed jumps.

The River Nadder is a tributary of the River Avon, flowing in south Wiltshire, England.

The Common Cold Unit (CCU) or Common Cold Research Unit (CCRU) was a unit of the British Medical Research Council which undertook laboratory and epidemiological research on the common cold between 1946 and 1989 and produced 1,006 papers. The Common cold Unit studied etiology, epidemiology, prevention, and treatment of common colds. It was set up on the site of the Harvard Hospital, a former military hospital at Harnham Down near Salisbury in Wiltshire. Common colds account for a third of all acute respiratory infections and the economic costs are substantial in terms of sick leave. Thirty volunteers were required every fortnight during trial periods. The unit advertised in newspapers and magazines for volunteers, who were paid a small amount. A stay at the unit was presented in these advertisements as an unusual holiday opportunity. The volunteers were infected with preparations of cold viruses and typically stayed for ten days. They were housed in small groups of two or three, with each group strictly isolated from the others during the course of the stay. Volunteers were allowed to go out for walks in the countryside south of Salisbury, but residential areas were out of bounds. Human coronaviruses, which are responsible for about 10% of common colds, were first isolated from volunteers at the unit in 1965. The CCU continually recruited volunteers for research into the common cold until its closure in 1990. The final director was David Tyrrell, whose autobiography describes his work at the CCU from 1957. The CCU was sometimes confused with the Microbiological Research Establishment at nearby Porton Down, a military unit with which it occasionally collaborated but was not officially connected.

Harnham is a suburb of the city of Salisbury in Wiltshire, England, centred about 0.6 miles (1 km) south of Salisbury Cathedral and across the River Avon. Harnham is split into the areas of West Harnham and East Harnham.

Clearbury Down (grid reference SU152240) is a 13.3 hectare biological Site of Special Scientific Interest in Wiltshire, England. It is above the village of Charlton-All-Saints in the parish of Downton, south of Salisbury. The site was notified in 1971.

Clearbury Ring is a univallate Iron Age hillfort which is partly in the parish of Downton in the county of Wiltshire in south-west England, approximately 5 kilometres (3 mi) due south of Salisbury city centre. The site, which is a scheduled monument, straddles the boundary with Odstock parish, and a slight scarp runs across the interior of the fort, marking the parish boundary.The fort occupies a prominent hilltop overlooking the valley of the River Avon, at an altitude of 142 metres (466 ft) above mean sea level. The hillfort is immediately adjacent to the Clearbury Down Site of Special Scientific Interest, but is not included within it.Clearbury Ring encloses an area of approximately 2 hectares (4.9 acres); the rampart is well preserved and consisted of a single bank with a ditch outside it. The fort had a single entrance on the north-west side, consisting simply of a 10-metre (33 ft) wide gap with a causeway across the ditch. Traces of a quarry are evident within the fort's interior. The fort is overgrown with tree cover. In 1632, Clearbury Ring was recorded as Clereburu. A paleolithic hand axe was found here. To the south-west of the fort are the remains of a lynchet, consisting of a steep 2-metre (6 ft 7 in) high scarp that runs parallel to the fort's defences. Two other lynchets have been identified near the fort, although they are not as well-preserved, together with faint traces of ancient field boundaries.

Salisbury District Hospital is a large hospital on Odstock Road, Britford, Wiltshire, England, about 1+1⁄2 miles (2.4 km) south of the centre of the city of Salisbury. It is managed by the Salisbury NHS Foundation Trust.