The John Deere HQ (featured in the article) is almost worth the trip to Moline, IL https://www.google.com/search?q=Eero+Saarinen%E2%80%99s+proj...
The IBM research center in Yorktown Heights is a section of a circle https://www.google.com/search?q=yorktown+heights+ibm&espv=2&...
The IBM research center in Almaden is in an amazing CA county park https://www.google.com/search?q=almaden+research+center&espv...