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In this episode of The Atlas Obscura Podcast, we present a tale from Twenty Thousand Hertz, a podcast that reveals the stories behind the world’s most recognizable and interesting sounds. On their show, they’ve explored topics such as the sounds of other planets, the mind blowing ways that insects communicate, and secret spy messages that are broadcast on the radio.

In this episode, they take you to the U.S.-Canadian border, where, in 2011, residents of Windsor, Ontario, started experiencing a strange rumbling hum. Years later, the mystery of the Windsor Hum was finally solved… Or was it?

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.

A potential source of the mysterious Windsor Hum.
A potential source of the mysterious Windsor Hum. Notorious4life, CC0/Wikimedia