Remnants of a medieval church which was largely destroyed during the WWII. Nowadays you can take a peaceful walk around its garden which has been turned into a public park.
Daily: 8 am - 7 pm or dusk (whichever is earlier)
Closed on Christmas Day, Boxing Day and New Year's Day.
More information at cityoflondon.gov.uk http://www.cityoflondon.gov.uk/things-to-do/green-spaces/city-gardens/visitor-information/Pages/St-Dunstan-in-the-East.aspx
Address St Dunstan's Hill, London, EC3R 5DD
Coordinates 51°30'34.783" N -0°4'57.095" E