Can I remove these stones on the front wall?

[Stones on the wall](https://imgur.com/a/3Ro1idp)

How can I remove the decorative (?) rocks on the front wall of the house? And what’s likely to be behind them? They’re hideous and I desperately want to remove them—just not sure there’s an easy way to do so.

Do I need to go to town on them with a chisel and hammer, or is there a better way?

Not opposed to paying someone to remove them, just not sure who (anyone who does siding?)

Appreciate any thoughts