I can think of two places/times I'd love to go.
One would be in the mid 1800s in the geographic area divided by the Catawba River, western Gaston County/eastern Mecklenburg County, North Carolina. My grandparents, bless them, talked so often with me, sharing stories of people they knew who lived back then and stories of others they did not know, that I feel like I know them. My grandparents were 2c1x, and born across the River from each other. They rooted me in their time period and their places. That's why I feel so out of place in my generation.
Second one: 1970s at my childhood home with my iPad (can I take my iPad, too?). I sit down with my dad and get him to tell me stories of his wartime experiences. I was too self-absorbed and foolish to ask when I had the chance.