Although many of its beautiful florae were moved to the modern botanical gardens of the Uithof on the premises of the university on the edge of the city, the so-called Old Hortus right in the middle of the historic city centre is still a green oasis of plants, flowers and trees. Initially founded in 1723, the garden was later re-designed in 19th-century landscape style. Don't miss the pride and joy of this special place which happens to be Europe’s oldest Japanese nut tree. Admission is free during the day.