Monument at north-western end of General Roy's survey base
Monument at north-western end of General Roy's survey base, cannon in Hillingdon, Greater London, UK
Location: London Borough of Hillingdon
Inception: 1791
GPS coordinates: 51.47919,-0.45061
Latest update: November 3, 2025 17:44
Waterside
2.6 km
Compass Centre
1.3 km
Queens Building, Heathrow
911 m
Harmondsworth Great Barn
2.3 km
St George’s Interdenominational Chapel, Heathrow Airport
991 m
Slipstream
1.1 km
Grow Heathrow
1.3 km
Harlington Locomotive Society
1.5 km
Skyteam Lounge Terminal 4
2.1 km
Church of St Mary, Harmondsworth
2.3 km
Church of St Peter and St Paul, Harlington
1.9 km
Church of St Dunstan
2.9 km
The Five Bells Inn
2.2 km
The White Hart Public House
1.6 km
The White Horse Public House
2.8 km
Green Man Public House
2.8 km
King Henry Public House The Stables
2.4 km
Harmondsworth Hall
2.2 km
The King William IV Public House
1.3 km
Harlington War Memorial
1.8 km
Lanz Farmhouse
1.3 km
Barn To West Of Weekly House
2.8 km
Acacia House
2.1 km
The Vicarage Tower House
2.2 km
Milestone, Bath Road; Harlington Corner (was Coach & Horses corner, later Arial Hotel)
1.1 km
Milestone, Bath Road; Harmondsworth, near Sipson Lane N side of Heathrow Airport
556 m
Longford Close
2.8 km
Milestone, Bath Road; centre of Cranford, 50m E of crossroads/traffic lights; E of subway to The Avenue
2.8 kmReviews
Visited this place? Tap the stars to rate it and share your experience / photos with the community! Try now! You can cancel it anytime.
Discover hidden gems everywhere you go!
From secret cafés to breathtaking viewpoints, skip the crowded tourist spots and find places that match your style. Our app makes it easy with voice search, smart filtering, route optimization, and insider tips from travelers worldwide. Download now for the complete mobile experience.
A unique approach to discovering new places❞
— Le Figaro
All the places worth exploring❞
— France Info
A tailor-made excursion in just a few clicks❞
— 20 Minutes