I have a weird fascination with underground rivers, be they natural, man-made, or just plain awesome. In a recent post about phobias, many people expressed fear of things lurking beneath murky bodies of water; what could be darker, or stranger or scarier than something lurking in a body of water that is itself lurking underground? There are many in the world: here's one of our favorites.
London's River Fleet
The largest of the so-called "lost" tributaries of the Thames, the River Fleet was a... READ ON