unexplained sounds

There's a deep pit in the "middle of nowhere" in New Hampshire with odd sounds coming from it.

A loud horn has been blaring along the Massachusetts Seacoast with sustained blasts for four to five minutes, on at least three occasions. There aren't yet any explanations of where it's coming from.

After a while, you kind of get used to it. It's a hum that some have compared to white noise but its origin is a mystery to many Missouri residents who keep hearing a low repeating noise.

Tiverton, Rhode Island residents were settling into bed last night when they heard a bizarre noise.