The Conservatory sits next to the Mansion and also shares the same perch upon which provides spectacular views of the whole of Canterlot City from the mountainside.
Fluttershy and Sunset are wandering in the background, and also showing the scale of the Estate they volunteered to House-sit. In the foreground, Spike watches a pair of garden shears levitates via an unknown force and sets to work trimming the hedges. undoubtedly one of the ghosts inhabiting the property.
The ghosts in the Daytime are mostly the spirits of Family Members or of former servants(maids,butlers,gardeners,etc) still doing their duties of maintaining the Manor and it’s grounds. At night, Ghosts from Canterlot Cemetery Hang out in the mansion and it’s grounds. drawn in by the colossal amount of spiritual energy it channels through producing a “false light” for them to be drawn towards. Their activity ranging from partying to a casual gathering.
There is a conservatory in madrid that shares the same name. I suggest looking it up
That’s what I first thought as well. ^^
Only crystal palace I knew of was in Britain, and it burned down ages ago.