Holland Island was an island in Chesapeake Bay, Maryland. In 1910, it was a thriving fishing community made up of about 360 residents in 70 homes. It had its own post office, school with two teachers, a church, baseball team, community center, and a doctor. However, wind and water had their way, and in 2010, the last house collapsed.
Some more here.
If you like history as much as I do, then you'll love Clouds Over Cuba. It's particularly interesting to me as I'm not so clued up about the Cuban Missile Crisis, and this interactive documentary by The Martin Agency provides superb coverage, as it were. There's even a 'What If' section to see what would have happened had things gone a little different. This is the kind of thing I wish we had had at school (although we didn't cover anything to do with it). The crisis is nearing it's 50th anniversary, and you can follow how things are going on JFK's Twitter profile. It's pretty scary reading, even if we do know how it turns out.