The underworld

In my late teens I used to have many astral flights. Every night I would be up and down like a yo-yo. Was very annoying. At the time I was smoking marijuana. (Don't know if that had anything to do with it or not).

One night, I had a dream (astral flight). I was floating in this massive eclipse building, with huge pillar structures. In between the pillars were blue static electricity pulses. Along side me were young females, floating, blonde hair, just with long white tops (I'm female btw).

They didn't say anything. Just floating with me. Moving through this huge void, this massive building filled with huge pillars.

The whole time there was this electronic/computer generated female voice in the background. Constant. I felt like it was in the future. (From the movies). The only words that stood out to me were, "You are in the Underworld".

I had never heard that term before. I had to look it up.
"A place of lost souls".

It felt very real at the time.

Anyone else had this experience?