Being a lover of Geography, I also am infatuated with its sibling, Cartography. Two sites I've visited recently will thrill genealogists, geographers, historians, and curiosity-seekers.
The first is The Map Room: A Weblog about Maps. [Caution: there is another site called maproom.com--which is a tavern in Chicago--not the same!]. This is a great blog. Recent posts have described errors in online maps; 250 years of Pittsburgh maps; and how Google Earth is fomenting discord in the Middle East (according to Iran). The posts are strong and substantive, enlightening and entertaining. There are very good book reviews as well.
But don't miss the blog Strange Maps. This is terrific. Again, the posts give up nothing on the side of good science while being most interesting and entertaining. How about Hitler's map to re-organize South America? Or a place in Germany completely surrounded by Switzerland? And one of the strangest maps is Thomas Jefferson's 1784 proposal for ten new states carved out of the Northwest Territories.