The City of London is rich with history, particularly Roman relics. A perfect example is this temple dedicated to the god Mithras, who inspired a mysterious cult that extended across the Roman empire from North Africa northwards to Britain and east towards Syria. The temple was discovered in 1954, when archaeologists uncovered a marble statue of the head of Mithras, along with hundreds of fragments of ancient Roman writing tablets. It's now situated below ground level, in a dimly lit room with the sound of footsteps and whispering that aim to transport visitors to a typical temple visit circa AD 240. And if you're wondering about the current moniker, it's because it's also the site of Bloomberg's European headquarters.