A Spectral Navigation Algorithm

Clearly, some users of London's transportation system are using a spectral algorithm for navigation.

(Tip of the cap to Sang Hoon Lee.)

Spectacular Abandoned Haunting Grounds

This list (and, especially, the accompanying pictures) of abandoned places --- which might be haunted (who knows?) --- is really awesome. The explorer in me wants to set sail right now!

Of course, there is a glaring omission. My old Caltech apartment ought to have been included. Criminal.

(Tip of the cap to Maria Satterwhite.)