The Miami airport has a series of connecting circular thingies and this one was by far the most dramatic. You may have seen Junko's as well: http://365project.org/jyokota/365/2015-12-13
Mine was taken with my fish-eye looking pretty much straight up and it reminded me of something out of Star Trek (for those who may have missed the title's reference).
We're now in Barcelona, testing Internet in our room after a lovely lunch at the Market, a visit to the chocolate store, and some wandering. Can't wait for our afternoon outing!