Nuclear Waste

Here's a thorny problem. Some Nuclear Waste is dangerous for up to 1000000 years. How would you design warning signs so future humans don't do something stupid? Here is one take on the problem. As far as I can see its near enough impossible, though the ideas of showing pictures of humans in distress is a good one. Here is what the Americans are doing at Yucca Mountain though if you did this wouldn't it become some sort of tourist attraction?