had a dream about a discovered megalithic site north of Los Angeles, East of Santa Barbara, possibly near lower Sequoia, the complex was inside of a huge mountan, huge gold & silver plates containing information, megalithic stone structures of the highest detail, everything in pristine condition, unlike anything previously known, similar on complexity as in Indian Temples, i would estimate the date at least 13,000 years or double that because of its size & complexity.

the underground site is most likely here..

https://en.m.wikipedia.org/wiki/Mount_Pinos

Mount Pinos, or Iwihinmu in the Chumashan language, was considered by the Chumash peopleto be the center of the world or Liyikshup. The point where everything is in balance. The summit is the highest in the area and near the center of the traditional lands of the Chumash.