WHERE KRISHNA’s GOLOKA VRINDAVAN?

(Bhagawan is everywhere & in all of us as well as in His Goloka Vrindavan at the same time!) ...
SRILA PRABHUPAD SAYS:

“Beyond the material sky is the brahmajyoti, or spiritual sky, where there are innumerable Vaikuntha planets.

Each Vaikuntha planet is predominated by the Supreme Lord in His Narayana form, and each Narayana has a different name--Pradyumna, Ani-ruddha, Sankarsana, etc.

One cannot see these planets because they are covered by the spiritual brahmajyoti effulgence, just as one cannot see the sun globe on account of the dazzling sunshine.

The effulgence in the spiritual sky is coming out of Krsna's planet, Goloka Vrndavana, which is above even Vaikuntha and where Krsna alone is the predominator"