Gotta love lullaby covers of the loudest songs (thanks Tyson)
The secret Italian way to make coffee
The explainxkcd.com entry for #2804 is almost better than the comic itself
Some of these I knew (like Mars) but some are a complete shocker (PageRank!?) (thanks Ryan)
"The lake has a concrete dam at the western end, constructed in 1999 to replace an earth dam which had existed since time immemorial" (thanks Matt)