Turn of the 20th century Chicago maps

I just discovered a web site called; Big Map Blog which features some fantastic 100 plus year old maps of Chicago.

Here's one with the Elevated lines of Chicago c. 1908.

Here is the Loop business district of 1898. Make sure you zoom in to see the fantastic renderings of the buildings, especially the late great buildings of the Chicago School of Architecture that barely any of us ever knew in person, especially Burnham and Root's Masonic Temple at State and Randolph Streets.

I could get lost in these views, maybe I will.