Sometimes known as ghost offices, large firms often have a building that secretly holds offices in case of emergencies, such as natural disasters, terrorist attacks, and pandemics. The relocating of the staff to these locations is known as a “disaster recovery” or “business continuity” site. This allows employees to work from the office rather than from home so they can have access to certain files and software. Some companies have already begun this process, including certain banks. These buildings often blend in, and you could walk right past one and not even know what it was.