Darkly interesting places worth a quick look, if you happen to be in the area.
The medieval church of St Stephen's in Ipswich now functions as the town's tourist information centre, but it retains many decorative elements from its time as a place of worship, including impressive monuments to the deceased.
On a recent family trip to Colchester Zoo we visited All Saints' Church. Unused and ruined for centuries, it now sits inside the zoo's grounds, beyond the Orangutan enclosure. Not much remains but it was an interesting and unexpected find for us.