One of the apps I use on a daily basis is Google Street View. It is rare to find an application which is multi-dimensional in the sense that it can serve such a wide range of needs - on both mobile and desktop.
Google Street View is embedded in most mobile mapping applications and allows users to preview landmarks on the way to an unfamiliar destination.
The Google Street View can also be embedded into any website and can be extremely useful for property listing websites.
Google is now going indoors to map things like malls and airports.
If your property websites don't have Google Street View capabilities, it is time to switch providers.