Berggarten Hanover

The oldest botanical garden in Germany is redolent with a mind-boggling assortment of global flora – including glasshouses for orchids, cacti and tropical plants – and features 300-year-old lime trees lining an avenue leading to a mausoleum holding the remains of George I of England. The combination ticket entry includes admission to Grosser Garten and Museum Schloss Herrenhäusen.