If you’re a big fan of old school maps, check out latest feature in Google Earth. According to Lifehacker:
The Rumsey collection includes 16 maps. Among them you’ll find a 1790 world globe, a 1680 map of Tokyo, and an 1814 map spanning the Pacific Ocean to the Mississippi–courtesy of Lewis and Clark.
To view these new old maps, you’ll need the latest version of Google Earth (use the program’s check-for-updates feature if you’re not sure you have it). In the layers section, select All Layers, then look for Featured Content > Rumsey Historical Maps.