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In this episode of The Atlas Obscura Podcast, we descend into a series of dark and decrepit tunnels with militaristic roots, which now attract graffiti artists and plenty of teen lore.

Our podcast is an audio guide to the world’s wondrous, awe-inspiring, strange places. In under 15 minutes, we’ll take you to an incredible site, and along the way you’ll meet some fascinating people and hear their stories. Join us daily, Monday through Thursday, to explore a new wonder with cofounder Dylan Thuras and a neighborhood of Atlas Obscura reporters.

Halls of underground graffiti.
Halls of underground graffiti. JUSTLOSTIT (Atlas Obscura User)