Locals have dubbed it a "portal to hell."

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Blue Ash, Ohio
Tucked away behind the Ohio woods exists "Satan's Hollow" - a storm drain that supposedly serves as a gathering spot for devil worshipers.

"It's one of the best known, but least seen, urban legends around here," local blogger Rick Fenbers wrote. "A group of Satanists supposedly used to meet there in some type of altar room and conduct their rituals. ... They must have been pretty good, because the legend claims they managed to open a doorway to hell."

And, while it may simply sound like local folklore, some insist it's not. As WCPO-TV noted, many claim they've heard screams from inside the tunnels at night. Others say they've seen things that can't be explained.

Paranormal filmmaker David Scott published a YouTube tour of the site and said he was terrified throughout the shoot.

"This is one of the scariest locations I have ever investigated," he said.

more plus pix.. http://www.sott.net/article/287142-Satans-Hollow-Tucked-away-in-the-Ohio-woods-exists-what-some-insist-is-a-portal-to-hell