MITCHELL PARK CONSERVATORY

The Mitchell Park Conservatory, a.k.a. "The Domes", is located in Milwaukee, WI, USA.  It is a horticultural masterpiece showcasing plants from around the world.
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There are 3 "domes" that display world plants: 1) The SHOW dome....displays are constantly changing with the seasons; 2) The ARID dome features dry and desert plants; 3) The TROPICAL dome features plants that are tropical in nature....equatorial, if you will.
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1st EXTRA: At this time, the Show Dome is featuring model railroading and some native plants. Look carefully and you will see several sets of tracks and model trains running. The image shows about half of the domes area;  2nd EXTRA: These are Golden Barrel cacti from the ARID dome;  3rd EXTRA:  The TROPICAL dome; 4th EXTRA:  Bananas growing from one of several banana trees growing there.
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You can learn a bit of the history of this place here:  https://en.wikipedia.org/wiki/Mitchell_Park_Horticultural_Conservatory