Leiden University Botanic Garden
The Hortus botanicus Leiden is the oldest botanical garden in the Netherlands. Built in 1590 and expanded in the following centuries, the Hortus is the green heart of Leiden. Here Carolus Clusius grew the first large collections of tulips in Europe, and Philipp Franz von Siebold introduced about 700 hitherto unknown plants from Japan and China. Visitors can go here for a relaxing walk; researchers from all over the world come here to conduct research into the renowned collection of the Hortus.