I've been absolutely in love with Rove. When out of town or just traveling within London, the app makes sure it registered where I go, whether I walk or ride, and syncs up the various photos I snap along the way. And then it presents everything in a nice visual diary.
It's great for heavy travelers (in and out of town) who want to document their journeys. You can check out mine for the last three months here
Try it yourself and download it here.