Bigger than expected and well maintained, but I was expecting more infos. Maybe I should have picked up a small guide at the start, but I think some signs would be nice to read what the chambers were used for. Pretty sure some were used for goods, prison, ammo depot,.. Now it was just walking around inside a wall. Still cool and interesting, but lacking infos

Fascinating place to visit, tickets can be purchased on site, no cash accepted - card only. We spent an hour walking around and accepted the complimentary guide offered at reception that had letters which corresponded to letters on the walls so you could find the relevant information. Glad we visited.

Very interesting underground tunnel system from 1500s that is open for exploring. Great views of the valleys on both sides from the large holes where canyons were originally installed. Lots of stairs and uneven paths so make sure to wear good footwear. It was very busy and the queue was long to purchase tickets. Best to purchase them online so you can skip the lines.

The Casemates are underground tunnels carved into the mountainside. They were used in times of war for protection while defending the city. We arrived late so could not purchase the tickets for the tour, but we were able to explore some of the outside tunnels. Cool architecture and great history. One of the highlights of Luxembourg.

Great chance to explore the old fortifications. Do ensure you have good grip shoes as you are often walking on well worn (smooth) stone which is often damp. Not an accessible experience as there are very narrow and steep stairs. Would be great for hide and seek or laser tag.

We did the tour of the casemates as part of the Wenzel walk around the city. As noted by others, not accessible with lots of stairs and uneven floors. You get a guide at the beginn8ng with descriptions linked to letters that can be found on the walls to guide you. It's very impressive to think what it took to build this so long ago.

We enjoyed this, it wasnt what we expected but we enjoyed it. One thing that we didn't know is that they were card only luckily we had our card on us as we were looking to pay cash. It can also get a little confusing so be sure to follow the map to see everything. The views of Luxembourg are great too from this location. It was a little expensive compared to everything else.