By Robert Adam, Elizabethan architecture.
Syon House is the west London residence of the Duke of Northumberland. A Grade I listed building, it lies within the 200-acre Syon Park, in the London Borough of Hounslow.
From Wikipedia, CC BY-SA 4.0.
Stand in front of it, point your camera, and LookUp names it from where you are, with these facts on the card. Every landmark you capture turns to colour on your London map.
Download on the App Store