When we were but little Welsh nippers visiting the big city, the National Sea Life Centre was something close to the Holy Grail. Our enthusiasm has not dampened with age, and every chance we get to visit this glorious aquarium on steroids is a chance we grab with both flippers. More than 2,000 ocean dwellers are found here, including the finest penguins of them all ― Gentoo Penguins. There are also crabs big enough to make you question the sanity of God, along with sharks, turtles, lobsters and more. The centre is found in the centre of the city, just a 20-minute walk from New Street to Theatreland.