You can find a buried treasure worth about $2M if you can solve the clues of where it's hidden in a national monument in New Mexico. Here's a story of a recent treasure hunter who got lost and had to be "rescued." (I put rescued in quotes because she actually rescued herself and really didn't need any help.)
I like this quote from an official:
"Monument officials used the hiker's experience to remind visitors to stay on marked trails and be prepared for changes in the weather. They also noted that it's illegal to dig, bury an item or use a metal detector on federal lands."
I am sure that someone who's looking for a buried treasure is going to ignore the monument's rules.