I’m a few days late getting this week’s entry up. Last week I looked to the past with the historic entrance sign for the Paris Metro. This week will be a kind of companion piece about a current project running in the London Underground. For the Underground’s 150th anniversary, artist Mark Wallinger was commissioned to create an art series. Inspired by the 2009 Tube Challenge, he created 270 unique labyrinths, one for each station in the London Underground and are on permanent display for travelers to view.