Assassins, Spies & the Manhattan Project Walking Tour in Santa Fe

Discover the world of J. Robert Oppenheimer and Soviet spies on this engaging two-hour walking tour in Santa Fe. Led by museum-trained docents from the New Mexico History Museum, this tour illuminates key locations related to the Manhattan Project and Cold War espionage. Explore the back-room office for the Manhattan Project, learn about vital spy craft techniques, and hear compelling stories tied to this historic period. With insights into the motivations of spies and the secrets exchanged, this tour provides a rich educational experience in a captivating setting. Private, customizable tours are available by request and docent availability. - Two-hour walking tour led by museum-trained docents - Discover key sites of the Manhattan Project and Soviet espionage - Hear true stories and anecdotes from a pivotal historical era - Tours available on select dates throughout the month from April to November - Private, custom tours are available

1. 1

   New Mexico History Museum

   10 min

   Discover the hidden world of Soviet espionage starting at the New Mexico History Museum in Santa Fe. This introduction explores the roles of spies and couriers, revealing how covert operations and secret intelligence activities shaped both global events and the region’s history. Learn the basics of spy craft and uncover Santa Fe’s surprising connection to Cold War intrigue.

2. 2

   Santa Fe Plaza

   10 min

   Discover key locations tied to Cold War espionage in Santa Fe, where history reveals the real-life world of Soviet intelligence operations. Learn about the Spitz Clock, linked to one of the most significant atomic espionage successes involving the transfer of sensitive information, and visit the site of Zook’s Pharmacy, once connected to covert plans surrounding the assassination of a Russian Marxist figure. Together, these stops highlight the surprising role of Santa Fe in global espionage and the far-reaching impact of spy networks.

3. 3

   109 East Palace

   10 min

   Explore the human stories behind one of history’s most secretive operations as you’re introduced to key figures and moments of espionage connected to Santa Fe. Learn about Dorothy McKibbin, the trusted gatekeeper of the Manhattan Project in Santa Fe, who helped discreetly manage the flow of scientists and personnel linked to the top-secret program. Discover the significance of PO Box 1663, a seemingly ordinary mailing address that served as a cover for highly classified communications and operations tied to Los Alamos. Through engaging anecdotes, this stop also reveals how even the most carefully controlled intelligence efforts were not without flaws, with stories of security lapses that exposed the challenges of maintaining secrecy during wartime. Together, these insights provide a deeper understanding of the people, systems, and occasional missteps that shaped one of the most critical chapters in espionage and scientific history.

4. 4

   Cathedral Park

   10 min

   Discover how Santa Fe’s historic sites concealed one of the most secret operations of World War II. At the location now home to the Museum of Contemporary Native Art, you’ll learn how a former post office once handled PO Box 1663—a simple address that served as a crucial front for Manhattan Project communications and personnel logistics. This stop reveals how scientists arriving in Santa Fe were discreetly processed and assigned aliases to protect their identities before being transported to Los Alamos. By uncovering the clever systems used to maintain secrecy, including coded identities and unassuming locations, this experience highlights the extraordinary measures taken to shield one of history’s most important scientific missions.

5. 5

   Stop 5

   10 min

   Discover a key moment in Santa Fe’s secret history, as Dorothy McKibbin meets Robert Oppenheimer—known under the alias “Mr. Bradley”—and is chosen to manage the discreet 109 East Palace office. From here, she quietly coordinated arrivals for the Manhattan Project, while scientists used everyday settings, like local bars, to spread misinformation and protect one of history’s most closely guarded secrets.

6. 6

   Stop 6

   10 min

   Learn about one of the Cold War’s most dramatic espionage incidents, as former CIA operative Edward Lee Howard—after being dismissed from the agency—secretly fled Santa Fe in 1985 and defected to the Soviet Union. His escape highlights the enduring presence of espionage activity in the region and the high-stakes consequences of intelligence betrayal.

• Infants and small children can ride in a pram or stroller
• Service animals allowed
• Public transportation options are available nearby
• Not recommended for travelers with spinal injuries
• Not recommended for travelers with poor cardiovascular health
• Suitable for all physical fitness levels

For a full refund, cancel at least 24 hours before the scheduled departure time.