Oh, you saw "Nebraska"??? We got that recently and have already watched it twice! Great movie, Bruce Dern was so good (as were the other actors). In addition to the early dementia topic, there was the greed factor involved too. Stacy Keach was such a creep! That is a good one.
For a good suspense movie based on actual history, one of my favorites is "Valkyrie" with Tom Cruise. I'm not a huge fan of his but that story was just so gripping. Here's a recap:
"By 1944, many senior German officers knew they would lose the war and that honorable surrender was the only way out. To do so however, they will have to eliminate their greatest obstacle - Adolf Hitler. There had been several attempts on Hitler's life but all had failed. The leaders of the conspiracy recruit the aristocratic Col. Claus von Stauffenberg, who had lost his left eye and right hand in action in North Africa, to lead their latest operation. The plan has Stauffenberg placing a bomb in the Fuhrer's bunker, the Wolf's Lair, and then returning to Berlin to take charge of the operation, which will include rounding up the SS and Josef Goebbels. When Hitler survives the blast, it all begins to fall apart."
If you do see it, be sure to watch the special features where family members of the conspiracists are interviewed and see the annual remembrance still being held today for those brave men.
Another one of my favorites is "Waking Ned Devine" made in Ireland several years ago. I had to go to Amazon to get a copy of that one, couldn't find it in the stores. Well worth the cost and time to watch (repeatedly).
Guess we could spend all day just on movies but those 3 are very good. I'll keep an eye out for others I think you might like.
P.S. As for the long walks on the beach, well, that's a whole nother topic