Greenhouse at the National Botanic Gardens in Glasnevin, Ireland. Like walking through an indoor jungle!
The Boboli Gardens, Palazzo Piti, Florence, Italy. A great place for picnicking!
Public Garden, Boston, MA
Formal gardens at Powerscourt, Co. Wicklow, Ireland
Fountains at the Peterhof Palace looking towards the Gulf of Finland
The Orangerie at Versailles
The futuristic greenhouses at Epcot, Disney World. They are actually incredibly cool
Gardens at the Katsura Villa in Japan. I love Japanese maples!
Winterthur Gardens...I'm a sucker for things that look like ruins.
Replacement Secret Garden photo, since the other doesn't seem to work.