Every American driver is familiar with those boring mile markers on the side of the freeway. In Colorado after marijuana was legalized, the mile marker 420 was stolen so frequently though, that the state had to stop replacing it. So they came up with a clever workaround -a mile 419.99 marker. Even so, stoners still make a pilgramage out to the mile marker and here and there people still steal the sign, but with much less frequency than before.
You can see more pictures of mile 419.99 over at Atlas Obscura