Here are some interesting sites worth a look:

Chicago's Underground Tunnels
Walkways convenient for the cold seasons. I bet you didn't know about all these secret passages!

Reverse Lookup on AnyWho
Type in a phone number and see who it belongs to. A great tool for those who need to trace back calls for business or clients who do not leave a message.

How to Survive 2012
A site on the predicted end of the world in 2012 and the polar reversal predicted by an archeo-astronomer and his author friend. The amount of depth and setup they have invested in this predicted disaster is truly mindblowing. The millenium bug of 2000 comes to mind..