SkyGarden is the new “public” space at the top of 20 Fenchurch Street, a new skyscraper in the City of London. People may know the building better as the “walkie talkie” or “walkie scorchie” (in light of its ability to melt cars and scorch the streets). //embedr.flickr.com/assets/client-code.js 20 Fenchurch Street was designed by architect Rafael …