The effectiveness of a nuclear bunker depends on several factors, including distance from the blast zone, structural integrity, and internal resources. Bunkers should be underground with thick walls, proper air filtration systems, and sufficient food and water supplies to sustain occupants for days or weeks.

While Washington D.C. has the highest concentration of shelters, its high-profile status makes it a prime target, reducing its overall safety. On the other hand, remote areas with fewer shelters may actually be safer if they’re far from direct impact or radiation zones.

Some speculate that secret underground cities exist for the elite, but these would likely be inaccessible to most people