A Large Ion Collider Experiment (ALICE) is one of the largest physics experiments in the world. Hosted at CERN at the LHC, ALICE is located 56 metres below ground, is 26 m long, 16 m high, 16 m wide and weighs 10,000 tonnes. Heavy ions moving at very close to the speed of light are collided in ALICE to create and study Quark-Gluon Plasma - the state of matter the Universe was in during a few millionths of a second after the Big Bang. 
On the picture, the detector is opened for maintenance and upgrades. Panorama of 12 images.
Andres T
CC BY-SA 2.0
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