Leveraging off of Alfred's post, here's my world-wide travels (Boy, this is getting some use on theSpoke!):

create your own visited countries map or vertaling Duits Nederlands

My scuba trips to Aruba, Bon Aire and the Cayman Islands don't show up too well. Here's my US travels:

create your own visited states map or check out these Google Hacks.

Spousal-Mandated Disclaimer:

I've only driven through Delaware, Maryland, and Wisconsin, never stayed there; I've only driven into Montana (a rather large state really) a few miles, just far enough to buy groceries while camping in Yellowstone; I've only been in Tennesee while changing planes; and I've only really STOOD in Alaska, as the plane refueled on the way to Tokyo. Almost all of the other states I've stayed at least one night, and some places weeks to decades.

Neat web tool.