it is a must to make a trip along the Casemates of Luxembourg with guided tour to tell you about the history of these tunnels. you'll also be able to have a nice view of the city from there. More

These are really fascinating tunnels to wander round and get lost (literally) in. There are some great views of the ciy and its old fortifications. Note though that some staircases are very steep nd narrow and not suitable for people with limited mobility. That aside, definitely a worthwhile visit. More

The Casemates were hard to find, but gave us great insight in to the history of Luxembourg More

If its piddling it down with rain - looking around the old tunnels, some dating back to Napoleonic times, can be an inviting option. Unless you are a fortification fanatic - you might find it a bit much-of-a-muchness - however there are some great views as the tunnels break for light at varies points along the valley. More

Our two children loved the maze-like feel of the casemates. They were free to roam through the intricate passageways without fear of getting lost. The history was interesting and enough to hold our attention without the expansive, museum feel of some of the castles we visited. Great location in the center of the city, near the restaurants and downtown shopping... More

Quite interesting to see the once, but one tunnel is pretty much like all the rest. More

In a city with not much to do - this is definitely a must see! Unique to Luxembourg and well worth the effort. I would recommend doing the walking tour available from the tourism office, as they take you through here and provide useful history and background on The Bock More

casemates unesco heritage with great history and wonderful view. you will spent nearly an hour in the casemates if you want to walk around and take pictures More

Very good view from the Casemate but it's not much too see. More like preserved an excavation site. I've found the castles in small towns are more interesting More