For safer cities, there is a new option-
Self-guided audio tours!
They give you the flexibility to see what interests you while getting the key information for that city.
You can find some free on-line, while others charge nominal cost. Others can be purchased either in advance on the web for your destination or at local shops.
I think this will be a trend of the future as society gets more technological and we want to learn more but don't want the time limitations.
Options include:
WAV and MP3 formats that can be used on CD & MP3 players, cell phones and Ipods.