Blue Reef Aquarium Portsmouth

The tanks here are genuinely impressive - massive walk-through tunnels where sharks glide overhead, rays hover at eye level, and you're surrounded by the sort of fish you'd normally only see on a David Attenborough documentary. Blue Reef Aquarium on the Isle of Wight doesn't pretend to be anything other than what it is: a proper commercial setup, but it's done well.

You'll spend two to three hours here if you're thorough, which is about right before the kids start flagging. Feeding times draw crowds, so arrive early to claim a spot. The layout flows logically - tropical fish first, then the cooler water species, finishing with touch pools where younger children can actually interact with starfish and sea urchins. That last bit tends to be the highlight for under-tens.

It's busy in school holidays and weekends, so go midweek if possible. The aquarium sits just outside Ryde, making it an easy reach from any of the caravan parks scattered across the northern half of the island - St Helens Coastal Resort and Parkdean Resorts Nodes Point are both within twenty minutes by car.

Parents need to know: it's indoors, so it works on rainy days when the beach feels like a non-starter. Admission isn't cheap and there's a fairly aggressive gift shop, but the tanks themselves justify the outlay. Not a full-day attraction on its own, but pair it with a trip to Sandown or the seafront at Ryde and you've got a solid half-day sorted.