hahaha Ayu likes to play with us (once again) ,,, i love this !
I still bet for Dubai,
first hint: ceiling decoration in the plane (that means night time) so she left by night in Japan and reached by night to destination by night too, so I'm pretty sure she flew into a Western country (6-8 hours flight?) ~~ that means she go to West country ~~ (India, Arabic country, East Europe?)
second hint: huge fountain in Hotel ~Dubai is known worldwide for having the most precious fountains and longest in the world
http://en.wikipedia.org/wiki/Dubai_Fountain
other hints from Twitter: she took a photo to a staff member eating a ice-cream first day there, in this photo you can read "gelateria MILA**" (i guess Milano) I searched through Google "gelateria Milano Dubai" and found it's situated in the most famous shopping mall of Dubai,,, casuality? xD
she also said by twitter 1 or 2 weeks ago in a reply she wanted to go to Dubai =)
thanks very much for translation Misa-chan ^^