"Digging for the Truth" is a fun series. Circa 2005 History Channel show that is in rotation on Story Television. They have a handsome, engaging, charismatic host that they've dressed up as a modern Indiana Jones (battered fedora, satchel, occasionally a jacket) and they do 1 hour episodes on mythical lost cities, etc. (Last night it was Atlantis, Pompei, lost city in the Amazon, and Easter Island.) The host travels around and talks to actual scientists and historians and does adventure bits that are educational and at least slightly linked to the premise (going into the underground of Naples to see the volcanic foundations the city was built on/with, helping carve a Moai on Easter Island, etc). They usually give you a pretty honest wrap-up--if the premise turns out to be false, they don't try to do a cheat ending, if a segment doesn't work they way they hoped it would the host explains the difficulties--"volcanoes are unpredictable and don't perform on cue," and you learn cool things along the way about navigation, building, and past cultures. Lastly, you can watch it in marathon/binge format and not get trapped; each episode is self-contained so you can go "oh, they're doing Atlantis next. That'll be cool but it's time for bed."