St Mary's Church, Harrow on the Hill

The church sits on top of Harrow on the Hill like something from a medieval postcard - you'll spot its distinctive spire from miles around, dominating the landscape east of Borehamwood. Walking up the steep High Street to reach St Mary's is part of the experience. The building itself dates back to the 15th century, though the site's been sacred far longer than that. Inside, you get proper medieval architecture: soaring arches, original stonework, and the kind of quiet that makes you actually think.

This is one for architecture enthusiasts and anyone who appreciates English parish churches without the tourist crush. The climb isn't trivial - the hill lives up to its name - but the views from the churchyard across Hertfordshire make it worthwhile. You won't spend hours here unless you're really into ecclesiastical detail, but thirty minutes to an hour lets you explore properly and catch your breath.

Admission is free, and it's accessible most of the time, though it's worth checking ahead if you're making a specific journey. If you're staying at any of the nearby parks - Aldenham Country Park is only five miles away, or Home Farm Glamping if you're after something more upmarket - St Mary's works as a decent half-morning outing. Pair it with a walk around the hill itself or head into Borehamwood for lunch. The church rewards a quiet visit rather than a rushed one.