Wikipedia is Dangerous.

I know of few better time wasters. There aren't too many places where you can begin by looking up 17th century sailing vessels and end up reading about the history of the Luftwaffe, only by clicking links within the articles. The trail went something like this:

Fluyt
Sailing Vessel
Sailing Ship
Corvette
Littoral Combat Ship
USS Freedom (LCS-1)
RIM-116 Rolling Airframe Missile
Braunschweig-class Corvette
Germany
Luftwaffe

It's sort of like the IMDb game. The way that works is if you are looking at one page in IMDb and you decide you want to look up another page, you are not allowed to search on the term. Instead, you just have to click links to get from one actor/filmmaker/movie page to another actor/filmmaker/movie page. Bonus points if you do it in 6 links or fewer.