Planes, Trains, ferries, boats, and automobiles too many times to list...
Art Galleries, museums, aquariums, ferris wheels, cathedrals cinemas, the opera house, the Mall, open top bus tours, the UN...
I have fed babies in Canada, France, UK, Italy, USA, Slovenia, Austria, Hungary, Germany, Czech Republic, Slovakia, and now in Switzerland.
When DD2 was 5 days old I fed her at the top of the Empire State Building and was warned that it was illegal... The employee was incorrect but I really wished that I could be caught so that I could put it in DD2's baby book.
Hey! This must be the most extreme place: en.wikipedia.org/wiki/Roosevelt_Island_Tramway
I am an anywhere, anytime baby is hungry feeder. (The only exception is in the first days of life when I am disastrously uncoordinated. I don't like Nork displays...)