What is the difference with spaces and places?
I like to think of them this way. A Space is like a One to Many relationship, while a Place is closer to a Many to One. I know that sounds weird, but its true. A Space can hold many thing, and will show up in the Markups List. Once you place a markup inside a Space it becomes active so you can filter by that Space. You can also do a few things like create an Area from a Space.
A Place however is, think of it this way, a detail drawing, or maybe a section in the specifications. Multiple things can be linked to that Place if you want. Places do not show up in the Markups list, but do have their uses.