A look at the inside of The Hive. As far as I know, it does take information from an actual beehive and translates it into sound and light effects in the pavilion.

The Orangery way up in the northern part of the Gardens, near one of the other entrances and Kew Palace. It does not house any plants these days, there's a quite decent restaurant instead.

It houses a small selection of artefacts that (as far as I know) are more or less contemporary with the house itself. Meaning just before or shortly after the Meiji restoration.

The other large body of water inside of Kew Gardens (besides the pond you could see on an earlier picture) is this lake with several . Although this is only a part of it. It looks natural, but is actually a man-made structure as well. If I remember correctly, this picture was taken from the Sackler Crossing, a small bridge across it, looking westwards along the lake's north bank to the right and two of the islands to the left.

Some of those treetops come quite close to the walkway, as you can see here. Also the walk itself is quite safe and stable. I'm somewhat afraid of heights myself and I never had any problem up there.