"The Botanical Garden was established in 1600, but moved a few times before settling on its current central site in 1870. The beautiful grounds are particularly noteworthy for the extensive complex of historical glasshouses. There are 27 in total, ranging from the grand Palm House that dates from 1874 to a specially cooled greenhouse used for growing arctic plants. It’s very much a working garden, used for scientific research, but for visitors it’s a beautiful—and free—spot to spend an afternoon."