Could be better to add a node with the museum "Museu Nacional d’Art de Catalunya" and to tag the building itself with "Palau Nacional de Montjuïc".

What does "Abandoned AA sites" mean? Perhaps "Abandoned Artillery Ammunition sites"?
In any case this seems to be rather a description than a name.

Is this place "Cerritos House" or "Ceritos House" called?

Is this place called "Moffit Harbour House"?

Does this place have a name?

Is this place called "Wreck House"?

Is this place called "New House"? Is this still a farmyard?

Is there "Dos Lomas House"?

Is this "Teal Creek House"?

Is there still a groyne?