Augmented Reality iPhone App

StreetMuseum—an iPhone app from the Museum of London—overlays four hundred years of historic images on today's city streets using Augmented reality.

StreetMuseum makes creative use of Google Maps and geo-tagging to show users how London used to look. You can use it to check out pictures and info about nearby historic locations and can be standing in front of a location in the database when the "3D view" kicks in.

That's an excellent use of Augmented reality!

Via Gizmodo