Caves in park in Yemin Moshe behind King David hotel

Behind King David Hotel is some more archeology.

Just realised this tomb has a circular stone rolled next to it.  Look hard and you can see this tomb has an iron door too, which is locked.

This one is nearby, different to the one shown in the above three pics.  Doesn’t have an obvious entrance.

Not sure who these tombs belonged to, or how old they are.   Suggestions please?