Why DOMunder in Utrecht was my coolest trip through time

Utrecht’s Cathedral Square (Domplein) is one of the most beautiful places in the city. Surrounded by the Dom Church, the Dom Tower, and several beautiful buildings, one can hardly guess what lies hidden beneath the cobblestones. A journey to DOMunder, 4.7 meters below the cobblestones and 2,000 years back in time, brings the past to life. What I experienced there was anything but a dusty museum visit.

DOMunder: Not Display Cases, but a Time Machine

What is DOMunder? Forget everything you know about guided tours. This isn’t about staring at artifacts in display cases. DOMunder is an interactive time machine. The journey leads downwards, from today’s surface level down to the Roman foundations 4.7 meters deep. We visitors transformed from tourists into active explorers, researching the secrets beneath the Domplein.

Before the tour begins, you check in at the tourist information office (Touristinfo) directly on the Domplein. This is where you receive your admission ticket. The meeting point is located just a few houses further. Here, you must lock up all bags (including handbags!) (free lockers are available). Then, we descended the first steps into two old cellar rooms, and the present was left behind above.

We have never experienced an exploration like this before. It was a unique adventure that brings history to life.

In the Footsteps of Roman Legionaries

The history of Utrecht begins right here, at the former border of the Roman Empire. To understand where we are standing, one must know: The Rhine was then the “Lower Germanic Limes” (today a UNESCO World Heritage Site), the heavily fortified northern border of the Empire. This Limes consisted of a chain of fortresses, watchtowers, and roads designed to protect the Empire from Germanic tribes.

Around 45-47 AD, during the reign of Emperor Claudius, the Romans built a fortress at a strategic crossing (ford) in the Rhine: the Castellum Trajectum, which translates to “crossing.” This site was the nucleus of the city of Utrecht.

DOMunder and the Roman Era

In the subterranean excavations of DOMunder, we were able to experience this earliest epoch up close. Archaeological findings are not just presented as “Roman remains”; instead, you learn the cohesive history of a place at the edge of the Empire. This includes the stone remnants of the original Roman roads, once walked by legionaries, as well as the foundations of Roman buildings that provide insight into the architecture of that time.

Drama beneath the Dom: When the Sky over Utrecht Tore Apart

After the Romans retreated around 270 AD, a new era began for the site. The former military camp transformed over the centuries. Upon the foundations of the Roman fortress, several churches were successively built, eventually culminating in the construction of the Dom Cathedral. The building of this church extended until 1520.

Now comes the part of the story I didn’t know: Today’s Dom Church is merely a fragment. We only see the choir and the transept. The massive nave, which once connected the church to the free-standing tower, is no longer there.

The reason? A catastrophe. On August 1, 1674, a tornado swept across Utrecht. The nave of the cathedral, whose construction was possibly not yet fully completed or was insufficient, could not withstand the force of the storm and collapsed. What remained were the tower and the choir—and between them, a massive gap. This storm, as tragic as it was, inadvertently created Utrecht’s most famous square, as the nave was never rebuilt.

My Highlight: Becoming an Archaeologist with the High-Tech Lamp

The tour now led us from the cellar back to the Domplein. In the middle of the square, where the nave once stood, another staircase leads down—the actual entrance to DOMunder.

And this is where it became truly exciting. Underground, the true dimensions become tangible. We stood amidst the massive, colossal pillar foundations that once supported the enormous vault of the nave. What a strange feeling.

Here, we were handed the “intelligent flashlight.” It looks a bit like a megaphone, and at the push of a button, we could activate the beam of light. Now, the most astonishing part of our DOMunder experience began. We slipped into the role of an archaeologist.

By pointing the lamp at a specific find—a foundation, a ceramic fragment, a Roman stone—we triggered a sensor. This action brings history to life: explanations from a city archaeologist sound through headphones, animated films are projected onto the walls, and images reveal what the structures once looked like.

For me, it was an extraordinary experience. Instead of passively reading information, I had to actively search, aim, and trigger the stories. I was an explorer, not just walking past “stones.” It was incredibly fun!

The highlight of the tour is the simulation of the “terrible storm” of 1674. State-of-the-art computer animations, light, and sound effects allowed us to experience the destructive power of the tornado up close.

Is it worth the visit?

Absolutely! I have rarely experienced such interesting “stones.” Here, history is presented in a truly tangible and understandable way. The 70 minutes went by far too quickly!

Visitor Information

Address

Touristeninformationszentrum / Utrecht Winkel
Domplein 9
3512 JC Utrecht

Website

The visit to Utrecht took place as part of a press trip.