If you’ve never been to NETHERWORLD Haunted House, make sure it’s at the top of your list. This year is filled with even more over-the-top sets, intense monsters and two new haunts – The Awakened and Subject: Unknown – packed into its new Stone Mountain complex. Netherworld Haunted House is opening a full week earlier than originally announced, this Friday, September 28 and Saturday, September 29 for a special “sneak peek,” according to a press release Thursday.