Nice, very touristy square. Aguas Calientes is esp...

Nice, very touristy square. Aguas Calientes is especially for the tourists. If you want to leave early for Macchu Pichu, this is the place to take the mandatory bus up early. Always busy.
Alternatively you can walk the Incatrail (considerable effort) so that you can admire the old Inca city from the sun gate early in the morning.