London.

If you want offline guides. You will have to buy.

Really great idea but several bugs. Little use for offline traveling. My iPhone is on Sprint network and didn't work in London so i had to use this in wifi mode. When it launches, it immediately starts playing audio files which can be annoying if you launch it in a quiet location. It doesn't remember your preferences so turning off the audio doesn't work. Lastly, the trip i did record disappeared on the next app update so the photos and gps points are gone. What a bummer, i wanted to explore exporting that and sharing it with friends and family. If they can work thru some of the bugs, it is an awesome idea, with great maps and information.

A must have if you are visiting London without local data plan