Summer vacation is almost over for many but, if you're planning an end of summer getaway before the clammy grip of Autumn takes your hand, you're probably also planning to take your mp3 player along for the ride.

If you're headed to Barcelona, London or Paris this might be worth the storage space. iAudioguide offers free downloadable city guides for five European destinations. The guides are available without registration and are provided in mp3 format, making them compatible with just about any portable player you're likely to own.

Admittedly, I've not tried these guides in their intended setting (if anyone is willing to cough up the travel expenses, let me be the first to volunteer to put all five of these guides through their paces). I have however listened to the London version, being the city on the list I have the most experience with, and I found it to be interesting if just a little campy.