When the weather is heating up, there's no better time to grab your cozzie and head for one of the UK's best outdoor pools.
Here's a selection to put on your 'must swim at' list.
This art deco, Grade II listed lido was built in 1935. The semi-circular seawater pool has incredible views of the ocean, and a fountain in the middle.
Open May to September, Cambridge's Lido was designed in 1923 and built to mimic the River Cam which runs alongside it – hence why it's so long (one of the longest lidos in Europe) and skinny.
At 50m, this pool is Olympic sized, has a sundeck and best of all is heated and open year round – which means you can cool off in summer, and still swim in winter, even if it's snowing.
Another Olympic-sized lido, this one brings the fun – offering midnight swims set to disco music! It's also filled with clean sea water that is heated to a balmy 29 degrees C.
Got a head for heights? Shap Swimming Pool is England's highest open air heated pool, at 900ft above sea level. What's really lovely though is that the 16m pool is run by volunteers on behalf of the local community.
Built in 1960, Pells Pool is England's oldest fresh water pool. It's spring fed and heats up naturally throughout the summer (as long as it's sunny), and there's a snack shop that sells baked goods to boot.
Recently refurbished, this heated outdoor pool has amazing views of the Clyde Estuary. Sunbathe on the terrace, park for free and leap off the diving board.
It's been under construction for the last two years, but this art deco pool with tea terrace is set to reopen in May. So if you can't face the pebbles of Brighton beach, head to this grand lido instead.
After reopening following renovation in 2016, Jubilee Pool will be back open for the 2017 season. The triangular lido first opened in 1935, juts out into the sea (but has high, protective walls around it), and has cubist-style changing rooms, as well as a café.