Ainslie Park

The path into Ainslie Park curves gently past scrubby willows and reedy wetland - you'll know you're in proper nature reserve territory straightaway. It's a modest spot just outside Cleethorpes, nothing glitzy, but genuinely worth an hour or two if you're staying at Haven Cleethorpes Beach Holiday Park or just need a break from the seafront crowds.

What you get here is a working nature reserve rather than a manicured attraction. The trails loop through reed beds and open water where wading birds congregate - bring binoculars if you're serious about spotting, or just enjoy the peace of watching dragonflies skim the surface. The boardwalk sections keep your feet dry when the ground's boggy, which is often.

Walkers and bird watchers will find their time well spent. Families with young children might manage 45 minutes before restlessness sets in - there's not a huge amount of infrastructure, and the scenery, while pleasant, won't hold everyone's attention for hours. That's not a criticism. It's the kind of place that rewards you for going quietly, not for showing up expecting entertainment.

The reserve appears to operate year-round with no obvious entrance fee, though facilities information is thin on the ground. Spring and autumn bring the best bird activity - winter can be bleak. It slots nicely into a coastal holiday where you want something green without travelling far from your holiday park base.