As an American, where we have comparatively little history (we’re celebrating 250 years - some folks in Europe live in houses older than that!) visiting Rome is almost mind blowing to see SO MUCH ancient history right there, and almost everywhere. So cool!
And then we went to Paestum, which is an even older Greek settlement in Italy - with the original Greek temples still standing. Mindblowing, and I'm used to old stuff being around(a friend of mine lives in a house where a portion of it is a listed structure dating to the 12th century, it's just a bathroom and a storage room for them lol).