Holy Trinity Church is part of Ooty's hill-station inheritance, a quiet Anglican church whose stone, timber, and stained glass belong to the colonial Nilgiri story. It is close to the centre but feels slower than the traffic around the lake and market.
The church is most interesting as atmosphere: old memorial plaques, cool air, and the sense of a British-era resort town trying to make itself permanent in the hills. Keep the visit brief and respectful.