Edinburgh International Climbing Arena (EICA:Ratho, formerly the Ratho Adventure Centre) is an adventure sports facility located in Ratho, near Edinburgh, Scotland. Built in a disused quarry, it is the largest indoor climbing wall in the world. Financial problems months after it opened in December 2003 put the Arena into receivership. It was purchased by the City of Edinburgh Council and fully reopened in May 2007 after a further programme of works costing around GB£6 million.