Mafia 98. Where have I ended up?

But besides the Berber with Berton, I couldn't find anything decent.

No, there's probably Timosha Berton there. Personally, I'm confused by the link mausoleum -> Taj Mahal in your riddle, as well as the fact that it's not mentioned in the wiki about this episode with the mausoleum. But overall, the direction is probably correct.