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New Hampshire’s Underground [google_map_easy id=”73″] Location: UnKnown New Hampshire Functions: Unknown Levels: Unknown Tunnels to: Unknown Notes: There may be as many as three underground installations in New Hampshire´s hills (according to reports). Source: Location: Pease Air Force Base: Near Portsmouth New Hampshire Functions: Unknown Levels: Unknown Tunnels to: Unknown Notes: Source: Location: New Hampshire Functions: Unknown Levels: Unknown Tunnels to: Unknown Notes: Source: