Wandering through Madison Square park on a dreary Friday evening, I was confronted by a giant white head protruding from the Oval Lawn. Jaume Plensa’s Echo is not the park’s most subtle or clever installation in the wonderful series which has included Kota Ezawa’s witty video installation City of Nature and Antony Gormley’s ominous sculptures, Event Horizon. But there was something alluring about it in [...]