In the state of Maine, there are almost 5,000 hidden treasures to be discovered. Mike Marino is a geocacher who takes the sport pretty seriously. He finds it hard to make it through a day without stopping here and there to hunt for a cache. He even holds a nationwide record for hiding the greatest number of caches in one day: 125. Follow Mike through the streets of Portland as he hunts for hidden treasure, and find out what makes a geocacher do what they do.