Milan Expo 2015 looks like it might have been quite eye-popping. The theme was sustainability - feeding the planet, energy for life! as google translate would have it; and so the trade stands are full of food and plants, gardens and greenery; and of course it was all recorded and put out on multiple channels, official and unofficial, which meant that when I discovered that the UK pavilion had involved a giant metal beehive full of music performed by half of Spiritualized, Wolfgang Buttress and 40,000 bees, I was able to find a video of what that looked and sounded like:
It's tiny; just a brief snippet. But the Hive (or perhaps part of it) will be coming to Kew Gardens this summer, so the experience in full is coming soon.