Saint Trillo's Church

You'll find this tiny church squeezed between a stream and a cliff face near Conwy, and honestly, it's one of those places that catches you off guard. Saint Trillo's is absurdly small - basically a single chamber with a stone altar, thought to date back to the 6th century. The real draw is the sheer oddness of it: a working church in a space barely wider than a corridor, with the stream running directly underneath. It's free to visit, and you can usually just walk in.

This is genuinely brilliant for history types and anyone who appreciates the offbeat corners of Wales. You won't need more than ten minutes here, but it's the kind of place that sticks with you. The setting is undeniably atmospheric, though if you're after something more substantial, it's a bit of a one-trick pony.

Stay at Bron-y-Wendon Holiday Park four miles away, or The Beach Caravan Park closer to Llandudno, and combine this with a walk along the Conwy river - it's properly scenic. If you're basing yourself in the area, it's well worth the detour, especially if you're already exploring the town's castle and fortifications. Just go without expecting grandeur; expect something far stranger.