Why is my sky reflecting on water and chrome faces that are underground?

I have an 18 storeys model with 7 that are UNDERGROUND with no visual connections to the outer sky. Original model made in SKU19 imported as an FBX file

Yet when I look at chrome surfaces and water, like a


swimming pool / lake I see the reflections of the sky.
Why is that and how to stop it?

Similar problem baffled me for a while. It seems to depend on the rendering method I used. Path tracing and LUMEN with Real Time removed the problem. Without LUMEN, the neighbor was in my mirror.

Hello Nader

Sorry for the late reply.
I can’t use Path tracer and I don’t really know if I can use LUMEN
I don’t have the best of Graphic cards.
I only have a Nvidia GTX1070 with 256Ram of CPU Memory

I just find it so bizarre that the sky shows down through the streets and the building
into the underground of my building

Go well

PS: I just posted another question on how to REimport a model without loosing all my TM
vegetation? I need to update the building in the center with all the streets and sidewalks
Do you know anything about it or an online tutorial.

My best friend is Nader his from Iran but in USA