Per 
Special Containment Procedures:
No males between the age of 18-45, and of minimum military fitness requirements may enter SCP-XXXX except for testing and on the day of SCP-XXXX-1. During the rest of the year SCP-XXX is to be surrounded by a two meter high wire fence, circumventing the whole perimeter. An outpost of armed guards is stationed on the outside of the West side of the fence. At all times, three armed guards must monitor the perimeter, with daily checks as to the maintenance of the security fence. Any non-authorised people who approach the fence SCP-XXXX is kept behind are to be strongly advised to leave the area, with force permitted in the case of disobedience. If an intruder at any time breaches the fence, they are to be shot on site before entering SCP-XXXX. This is to ensure the structural integrity of SCP-XXXX is not compromised in any way. On the day of SCP-XXXX-1, all patrons entering SCP-XXXX must present a valid form of identification which will be noted by personal posing as historians and site administrators.
Description:
SCP-XXXX is the designation given to the ██████ ████ War Memorial Bunker in ████████████, ███ ████████, a previous base for Allied Forces in World War Two. The Bunker, located at the top of Mount ██████, has two tunnel entrances, which lead to a network of passageways going as far as 2km into the mountain. Within the base are testing rooms, storage facilities and dormitories, all consistent with a military base of the era. However, each year on ██/██ SCP begins to display anomalous properties. Approximately 1.4 km’s into the bunker, a tunnel will manifest off the main passageway, designated SCP-XXXX-1. This tunnel’s architectural design as well as building materials used to create it appear in keeping with the rest of the memorial. However, no exterior light enters the tunnel past its top step. Any light producing device, i.e. lamps; torches, candles and even night-vision sensors, cease to work upon entrance into the SCP-XXXX-1’s entrance. Any male, between the ages of 18 and 45, meeting the minimum fitness requirement for the ███ ████████ defense force, and possessing loyalty to the countries of the allied forces (whether consciously or subconsciously), who enters SCP-XXXX-1 will disappear completely after passing its entrance by between 20 and 50 meters.
