Wicken Fen

The National Trust's first ever nature reserve, originally set up in 1899 and much expanded since, Wicken Fen in Cambridgeshire might just be the most biodiverse location in Britain. Over 9000 different species are said to inhabit this remnant of fenland, which has expanded to cover over 2000 acres, and its reeds and fields are home to a prodigious variety of birds and dragonflies. As part of their 'Vision Project', they've introduced ponies and highland cattle too. It's a great place for families, with regular pond-dipping, guided walks and other activities, and 2024 sees them celebrate their 125th anniversary with lots of events and other good stuff for adults and kids alike.

You can see a representative part of the Fen on a circular boardwalk, which starts at the visitor centre, but you might want to dig a little deeper, in which case you can rent a bike at the entrance to discover the wildlife and nature in the greater part of the reserve.  You can also take a boat trip on the electric-powered Mayfly, which runs regular 50-minute guided trips through the Fen between March and October. Just one part of The Fens, this area of East Anglia is fast becoming the most significant wetlands site around, hugely important for conservationists as well as a cracking place to visit – and like all the best National Trust sites, there's a cracking café to match once you've finished your exploring.