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Explore Amsterdam’s WWII secrets with Operation 45, an interactive puzzle tour uncovering hidden stories and landmarks in a private, flexible adventure.
Operation 45: An Adventure in Diamonds offers a fresh, engaging way to explore Amsterdam’s history beyond traditional sightseeing. This two-hour interactive experience combines city walking, puzzle solving, and storytelling — perfect for those who want to learn about WWII’s impact on Amsterdam while having a bit of fun. It’s especially appealing if you enjoy immersive, puzzle-based tours that showcase the city’s lesser-known stories.
One of the standout features is the customizable schedule, allowing you to play whenever it suits your day. Plus, the private group setting makes it ideal for families, friends, or small travel groups wanting a tailored experience. However, be aware that this tour relies on good weather, as it’s primarily outdoors, and bad weather could require rescheduling or a full refund.
This experience is well-suited for history buffs, puzzle lovers, or travelers seeking a memorable, hands-on way to discover Amsterdam’s WWII history. With its blend of storytelling, city exploration, and team competition, it promises a unique adventure that goes beyond just ticking off sights.

Looking for more options in Amsterdam? Here are some other experiences worth considering.
Operation 45 isn’t your typical city tour. It’s an interactive game that invites you to step into the shoes of resistance fighters during WWII, uncovering secrets about Amsterdam’s hidden diamond stash. The story begins on May 10, 1940, when Nazi forces invaded the Netherlands, and a secret mission was launched to safeguard the city’s valuable diamonds. Your task? To find out what happened to those diamonds after WWII, following clues left by the resistance.
This tour makes history come alive by blending storytelling with physical exploration. You’re not just passively listening; you’re actively piecing together a story, walking past real buildings, monuments, and locations that played a role in the city’s wartime history.
The tour starts at Mystery City Games, Zwanenburgwal 178 — a conveniently central location in Amsterdam, close to public transportation. From there, your group will set out on an approximately two-hour journey, which ends back at the start point.
During this walk, you’ll see some of Amsterdam’s iconic sights, but with a twist: each stop is another puzzle piece, unlocking parts of the story and revealing hidden details. The puzzles involve decoding clues, solving riddles, and exploring interesting buildings and monuments. The guides are known for their friendly and helpful approach, often assisting participants who struggle with reading maps or locating clues — as one reviewer pointed out, “we realized we weren’t good at reading maps, but staff were always ready by phone to help.”
What makes this experience stand out is the storytelling element. You’ll learn true stories from the city’s WWII days, which adds depth and context that typical sightseeing tours lack. The story about the secret mission involving the industrial diamonds adds a layer of intrigue, making history feel tangible and personal.
Multiple reviews mention how the guides, though not named directly, are especially helpful and capable of enriching the experience. They help keep the group motivated and on track, especially when participants aren’t comfortable navigating the city on their own.
If your group has six or more people, you have the option to split into competing teams. This adds a playful, competitive edge — perfect for groups who enjoy a little friendly rivalry. The first team to solve the mystery wins, which can make the experience more dynamic and lively. But if you prefer a more relaxed group experience, you can stay together and work as one team, which some travelers appreciated for its camaraderie.
As you walk between clues, expect to see Amsterdam’s historic buildings and monuments, which allow you to see the city from a different perspective. The clues are designed to encourage you to observe your surroundings carefully, making it a great way to notice details you might miss on a typical tour.
The story of the resistance and the hidden diamonds is not only engaging but also educational. You’ll learn about the Nazi invasion, the resistance’s efforts, and the city’s liberation, all woven into a narrative that feels like stepping into a real-life mystery novel.
At just under $29 per person, this tour offers excellent value for an active, story-driven experience. The two-hour duration is just right — long enough to explore thoroughly without feeling rushed. The group discounts and mobile tickets make booking and participating straightforward and convenient.
The tour is suitable for most travelers, including families and less experienced explorers, since the guides are attentive and willing to lend help. The only major consideration is the weather; since much of the tour is outdoors, poor conditions could impact your experience.
One reviewer, Mickie_N, summed it up nicely: “Loving the hunt for answers from the past,” highlighting how immersive and fun the puzzle element was. She also appreciated the staff’s readiness to help with navigation, which can be a real lifesaver in a busy city.
Another key insight from reviews is how knowledgeable guides bring history to life, making the experience both educational and entertaining. The combination of stunning views, interesting landmarks, and a compelling story makes this a memorable outing.
This experience is best suited for history enthusiasts, puzzle lovers, and those who enjoy interactive adventures. It’s perfect for travelers who want to see Amsterdam in a new light, combining exploration with storytelling. It also works well for small groups or families, thanks to its private nature and flexible scheduling.
If you’re visiting Amsterdam and looking to add a story-rich, active element to your trip, Operation 45 offers a unique way to connect with the city’s WWII past while having fun.
Operation 45 is an engaging, educational, and fun way to explore Amsterdam’s WWII history. Its interactive, puzzle-based format offers a different perspective from typical city tours, immersing you in a story that feels both personal and thrilling. With knowledgeable guides, flexible scheduling, and a private setting, it’s a great choice for those who want to combine sightseeing with an element of challenge.
The tour’s affordability, combined with its authentic storytelling, makes it excellent value. Whether you’re a history buff, a family seeking a memorable outing, or a group of friends looking for something different, this experience delivers a memorable, captivating afternoon in Amsterdam.
Overall, if you love uncovering secrets, solving puzzles, and walking through a city filled with stories, Operation 45 is a must-try. It’s a perfect blend of education, adventure, and fun that leaves you with a deeper appreciation of Amsterdam’s resilience and hidden tales.
How long is the tour?
The experience lasts approximately two hours, making it a perfect short activity that still feels substantial.
Where does the tour start and end?
It begins at Mystery City Games, Zwanenburgwal 178, and returns to the same location after completion.
Is this tour suitable for families?
Yes, it’s suitable for most travelers, including families. The interactive puzzles and storytelling are engaging for a wide age range.
Can groups split into teams?
Yes, groups of six or more can be divided into competing teams to solve the mystery first, adding a fun competitive element.
What should I bring?
Comfortable shoes for walking and a smartphone or device if needed for clues or help. Weather-appropriate clothing is recommended since the tour is outdoor-based.
Is this tour weather-dependent?
Most definitely. The experience requires good weather. If canceled due to rain or bad weather, you’ll be offered a different date or a full refund.
How much does the tour cost?
It’s priced at $28.66 per person, offering great value for an active, engaging experience.
Are tickets mobile?
Yes, tickets are available as mobile tickets, making booking and checking in hassle-free.
Is there a cancellation policy?
Yes, full refunds are available if you cancel at least 24 hours in advance. Cancellations within 24 hours are non-refundable.
Can service animals participate?
Yes, service animals are allowed on this tour.
In all, Operation 45 proves that learning about history can be playful, immersive, and surprisingly affordable. It’s a fantastic way to uncover Amsterdam’s wartime secrets while enjoying a fun, interactive adventure.