In Greece if you find ancient artifacts you are fucked. First of all you cannot own any of it, second your property is barred from construction of any kind until further excavation and the eventual removal or compulsory sell to the government. Thing is that this procedure make take decades as the archaeological department have work for centuries and cannot follow everything much less pay for the purchase of thousands of acres of private land. Many people just destroy everything they happen to find when building a house, which may include bribing the mandatory archaeological committee that inspects every plot before the issuance of a construction permit.