Botanic Garden Berlin-Dahlem (Germany)
Credit: Getty Images

Another of the world's biggest botanical gardens, Berlin-Dahlem holds more than 20,000 cultivated plants, an arboretum, and 16 public greenhouses – its Art Nouveau-style tropical greenhouse is one of the world's largest – which showcase flora from Africa, Australia, East Asia, and the Mediterranean.

Germany's former Royal Herbarium became the Botanical Museum, and in recent decades has been expanded and redesigned for research and to educate the public on the science of plants and their use throughout history. A special draw here is the reconstruction of floral decoration from the tombs of Egyptian pharaohs.
[bgbm.org]