From bucket-list landmarks to world-famous theme parks, some attractions promise unforgettable experiences – but not always for the right reasons.

New research analysing almost 100,000 visitor reviews has revealed the tourist attractions most likely to leave travellers disappointed. And for the second year running, a seemingly popular British destination has topped the list.

Complaints about crowds, poor value for money and experiences that fail to live up to the hype have left some of the world's biggest names with surprisingly negative reviews. But which attractions are falling short – and which destinations are proving victims of their own popularity?

New research from Radical Storage, a worldwide luggage storage network, has revealed that Alton Towers in England is the most disappointing spot, followed by Georgia Aquarium and the Horseshoe Casino, both in the United States.

Starting with a list of 5,832 different tourist attractions in 50 of the most visited countries from EuroMonitor’s Top 100 City Destinations report and Mastercard’s Global Cities Index, the boffins at Radical Storage narrowed down the list by removing those with fewer than 2,000 reviews.