Secret Nazi Bases is a documentary TV series that explores the hidden locations and secret operations of the Nazis during World War II. In season 4, which aired on U&Yesterday, experts use new technology and historical records to uncover underground bunkers, mysterious tunnels, and lost military installations across Europe. Each episode reveals how these bases played crucial roles in Hitler’s war strategy and uncovers stories that have been buried for decades. The show features interviews with historians, rare footage, and dramatic reconstructions to bring history to life. Season 4 ended on June 25, 2025—sign up for a reminder if you don’t want to miss future updates or reruns of this fascinating series about one of history’s most secretive regimes.Generated by ChatGPT.