Los Alamos, NM
Los Alamos offers guided walking tours of the former Secret City, where the Manhattan Project was developed. Tours run Monday through Friday at 10 a.m. and 1:30 p.m., and Saturday at 11 a.m.; tickets cost $25 per adult and are free for visitors 18 or younger when accompanied by an adult. The program includes visits to the Los Alamos History Museum, the Romero Cabin, and an Ancestral Pueblo site, with exhibits covering homesteading, the ranch school, the Manhattan Project, and the Cold War.