Excellent photo's. :D
I once had a copy of the architect's plans for the building that sits over the track bed train exits for Liverpool Street Station in London. :D
While it looks like it's supported from underneath, that flat surface is only a raft, and all of the support comes from the buttresses at each side of the track beds. :D
Some chewy engineering work in there. :D
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What about a series about political suicides that have taken place at The Four Seasons? :D