Anybody knows this show? I watched this a lot in my childhood, and now they're doing a new season since it ended in 2000 fuck yeah.

It's in a fort in France, where contestants try to access the treasure room. For this, they need keys to open the door, and a key word to make the treasure drop.
To get them they have to go through a series of trials.

I suck at describing stuff and it's 3 AM, so here's a video of the Excalibur trial (it starts at 0:43) :