You may already be familiar with the work of EVOL, he’s the German artist who turns those power boxes you see on the side of the roads into apartment blocks, in effect creating miniature cities. Recently he was asked to create an installation in a place that’s almost the opposite of his normal environment… an open field. Instead of building something on the land, he decided to create in the earth itself.
He ended up creating an intersecting X shape that allowed him to create his own city in the land that viewers can walk amongst. As you can see from these photos (scroll down to the comments) it looks like the trenches must be about 4 or 5 feet deep, which in total took him about 8 days to unearth (you can see process photos here, scroll down again). The effect though, is amazing, like he’s unearthed some sort of secret world. I wish I would have been able to walk around in it.
Found through This Is Colossal