The gardens were opened in honour of Queen PERSON@1 's Diamond Jubilee , and contained a large lake , which covered , and what can only be described as a small early version of a roller coaster , known as a switchback -LRB- an alternative general term for a roller coaster -RRB- .

The gardens were opened in honour of Queen PERSON@1 's Diamond Jubilee , and contained a large lake , and what can only be described as a small early version of a roller coaster , known as a switchback .
