How about finding ancient ruins in the construction site?

I am from Greece and for example there is a plot near me that once had a one story house. Property owner decide to demolish it to build a bigger one (2-3 story) but during demolition some ancient Greek ruins were found. After many months of slow digging by hand from workers (payed by the owner) it was decided that no construction was permitted in the property. 15 plus years later the property is still a bunch of ancient ruins dirt and vegitation as at best you could just bury it all and make a vegetable garden.

And anyone in the nearby properties would be a fool to even considered any construction in their properties as it pretty obvious from the exposed ancient wall lines that they are passing under their houses.