Data reveals that 1.03 per cent of the 2,803 reviews of the North Wales park mention litter. Wales's largest national park attracts more than four million visitors each year from across the world to climb its various hills and mountains. Second on the list of the UK's most littered attractions is Blackpool’s Pleasure Beach Resort, with 0.69 per cent of reviews mentioning litter. Ben Nevis, the UK’s highest mountain, is the third most littered attraction, with 0.66 per cent of reviews mentioning litter. In sixth place is Chester Zoo, with 0.548 per cent of reviews mentioning litter.