Laid out in 1842 and recently restored to better reflect its original plan, the lush Trädgårdsföreningen is a large protected area off Nya Allén. Full of flowers and tiny cafes, it’s popular for lunchtime escapes and home to Europe’s largest rosarium, with around 2500 varieties. The gracious 19th-century Palmhuset is a bite-size version of Crystal Palace in London, with five differently heated halls: look out for the impressive camellia collection and the 2m-wide tropical lily pads.