I'd like to be there the night Alois Hitler had too much to drink at the biergarten and went home to Klara with lust in his eye. I'd keep buying him booze until he was too drunk to perform so that they couldn't conceive little Adolf.
What happened to Amelia Earheart,
And to witness Dino's .
Also see for my own eyes, there never, was a world wide flood or an arch .
I could go on and on on that topic. It would be tough to choose.
I'd go back to 1980 !! And witness my self sneaking out the house as a toddler and running down the sidewalk with all my clothes off any chance I got and see the look on my parents face when they got the call from the neibours... That's my personal historic event but I've heard story so much I'd like to witness it played out :)
What really happened to the Maine!
The miracles in the bible.