6 Alton Avenue

At first glance, this Voorhees, NJ home known as the Alton Estate seems like your average, over-the-top, suburban mega-mansion, with its ridiculous amenities like a Grecian-inspired pool, two-story pool house that connects to the main house via an above-ground ramp, 12-person Jacuzzi, DJ booth, full gym with cedar-lined sauna, soundproof movie theater, and 42-seat bar. But then it gets really interesting. First noted by Curbed, the listing touts a 130-foot-long, solid concrete, underground bomb-proof tunnel. It's not clear why the owners installed this insane panic room, but for those who live in fear of the Apocalypse, and have $2.9 to spare, here's your dream home.
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