Gird your greyscales

Logan Hicks has some really great subterranean photography going on. (Via Infrastructurist)

And if you like that, you’d probably also like some Russian submarines, their interiors, and their underground bases.

While we’re dwelling on intriguing/depressing concrete structures: one dude’s home built into a former missile silo and the Oak Ridge plant where the materials for the Manhattan Project were refined.

Adam Keys @therealadam