Left: The construction of the John Hancock Center circa 1965-1969. Right: The Hancock Center is completed, as is Water Tower Place. The historic water tower buildings and a ground-floor Walgreens at right remain the same.
The Trulli houses of Alberobello in the Puglia region of Italy were built by settlers from limestone and not much else. An impressive dry stone building technique meant the houses could be collapsed simply by pulling out a keystone. Anyone else thinking they look like hobbit houses? Not just us then.