Replying to How do we know if its real?

I am really bored and I was thinking...

How do you know something exists if you have never seen it for your self. For example Stone henge. How would i know it exists? Just by taking peoples word that it does and pictures? They could be lying and the pictures could be fake.
Or since i live in Connecticut, how would i know california exists or any place i have never been too?

Another example is the holocaust. how do i know it really happened? i have heard a lot of horrible stories about it but how do i know it was real? IM NOT SAYING IT WASNT.

so how do you know something exists? just because people say it does? from pictures that could be fake?
I have no idea what im getting at but im bored and i was thinking. Try it for yourself. THink of something, and event, or someplace you have only heard about or seen pictures but never been to and think of why you think its real. maybe it isnt. who knows.