@onceuponatime,
I think ancient Greek used these holes as points of security views, but probably they might not think a "Dude" will visit that place in future and will use it to explain something weird! Yeah I mean "weird", coz I never thought to see in my window! Of course, it can show me different faces of my own live then!
Anyway one day i would like to see through this window when BTS and STEEM rise to the moon! (I mean I could visit this place then)

Cheers~