A trip to the Paris herbarium in the Jardin des Plantes, Paris.
I was given a guided tour of the Paris herbarium by Marc Jeanson: 8 million specimens, fully imaged and sorted into APG III order. Citizen science project Les Herbonautes encourages volunteers to catalogue the collection online photos.
Grandes Serres (Greenhouses) contain drought tolerant and tropical plants:
Systematic beds, alpine garden and historic trees
Gallery of Botany: