On the August 14, 2017 episode of Know How, Patrick Delahanty and Bryan Burnett discuss geocaching. They go out and find a cache to demonstrate and announce that they've hidden their own cache as the "Official TWiT Geocache" and that the first to find would win a Leo Laporte bobblehead...but that it would not be submitted to Geocaching.com until after someone found it (in hope that a fan of the TWiT.tv Network would find it first.)
Well, that bobblehead has been claimed and the cache is still hidden at the coordinates given in the episode. How can you find it? You'll have to watch the episode to find out. You can watch the episode at https://twit.tv/shows/know-how/episodes/336 or on YouTube at https://youtu.be/qAL6nUJiYtg.
PS: The people that work at TWiT know about the Geocache. Sometimes they'll be watching you from their office windows and the love to see how long it takes people to find it. Don't mind them. Feel free to wave!