Australia
Before you travel anywhere scan you passport and store it on a hotmail account which has been opened solely for that purpose and remember you password of course.
If you lost your passport the hotmail account will give easy access for getting help, eg from the nearest Embassy etc.
The reason I recommend this is that it enabled me to take advantage of the seniors' reductions in the museums and places of interest. This saved me some money in what is quite an expensive city. I also did not have to take my passport out with me.
Search Been there