Cavern + ancient ruins

We were exploring a huge cavern with a tour guide. At first, it was all natural cavern stuff, but as we got further in, we started to see the ruins of Greco-Roman style columns and related structures. As the tour guide showed us one spot, which was mostly natural rock, he showed how, if you climbed a few feet up, you could see more ruins. In fact, a square window in the back wall, which had previously been sealed with rock or cement, was somehow now open, and from the perspective a few feet up, I could see through the window and down into another huge chamber that continued downhill for quite a ways. I could see tons more columns and other ruins, all colorful with paint that I wasn't used to seeing on old, weatherworn ruins.

Not visiting the royal family of Japan

Earlier, I went to visit the royal family of Japan. Their hall was a big, fairly square setup, with normal house height ceilings. Aesthetic seemed kind of Greek. Lots of marble. There was a name on one of the walls, I think it was the royal princess's name. One of the words was Inouye, the other was something like ??kibuki. I recalled having visited the princess before a while ago and we seemed to get along okay, but I was shy about running into anyone this time, since they probably wouldn't know who I am anyway. I just kind of walked around the perimeter of the hall.

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In an elevator, trying to get to the fifth floor, with a sort of familiar Asian dude there with me, like we'd met before but didn't really know each other. He was headed to a different floor, apparently above 5. The button light turned off as we passed 5, but the elevator didn't stop. We both thought it was weird. I pressed the button again, to catch it on the way back down. Again, it skipped 5 and went down to the first floor. I decided to get off and take the stairs. But, getting off, I was in an eating area, sort of open, food courtish, with a TGIFish atmosphere. I saw Dave K and Ben and a third guy standing leaning over a high table and they saw me and I decided to go over for a bit. (I was under the impression that this building & floor were the same general area where the royal hall was, not too far off from it.)