Are all beaches old?

I don't know why I thought this was such a funny conversation, but It was...

I was telling my mom about this beach Sparky and I are going to go visit outside of Rio.
I said,"We're going to go visit an antique beach called Paraty."
"What do you mean an antique beach?"
"I mean it's an old beach."
"How can a beach be old, ALL sand is old?"
"I meant it is an old town."
"What makes it old?"
"It has a lot of history to it."
"What kind of history?"
"I'm not sure."
"Oh, ok."

antique? old sand? why old? history?
Leave it to moms to always ask questions :)