Pre-Roman and Roman sites dominate this short list, but there are two fascinating remains of past medical history, one each of water supply, of an entertainment park, and a WW2 aerodrome. Local knowledge may yet unearth some other hidden gems...
Top five earn asterisks.:
- Arc 1: New River source
- *Arc 4: Lullingstone Roman Villa
- *Arc 11 inner & Spoke 10N: Verulamium
- *Spoke 5 link: Horton Country Park (Epsom Cluster)
- Spoke 5 var: Roman Stane Street
- *Spin-off 1-2-3: Hornchurch Country Park (RAF Hornchurch)
- Spin-off 4: Dartford Fever & Isolation Hospitals; Rosherville Gardens
- *Spin-off 11: Ivinghoe Beacon
- Spin-off 12: Cassivellanus' Oppidum