The first day that we were in London we went to the Royal Botanic Gardens at Kew. I have to say London traffic is awful, but our overall experience was amazing. It was a rainy day, so there weren’t too many people crowding the walkways and glasshouses. One of the first things you will see walking is the Kew Palace! It is splendid. The color of which it is built is so deep and rich. If you decide go take a tour, make it quick and don’t expect too much because it’s a bit boring and bland on the inside. The first thing I would suggest going to would be the Princess of Wales Conservatory because it’s huge and has lots of cool things near it. The Princess of Wales Conservatory has around 10 different zones for you to explore from the desert to tropical carnivorous plants to Orchids. One zone is usually dedicated to temperate carnivorous plants, but we unfortunately did not get lucky enough to experience it as it was closed. I hope to come back soon when I can see it. The tropical carnivorous plant section is zone 8, and it was the highlight of our trip. It is mostly Nepenthes, though, so if you are expecting a wide display of butterworts to Heliamphora to sundews, you are not in luck, I’m afraid. I did get a few good selfies with the Nepenthes, and that was a lot of fun. 

Nearby the PW Conservatory, there’s a large outdoor section of temperate plants and alpine plants from all over the world. If you like cacti or carnivorous plants, you will love it. It’s a lovely walk and it will also lead you to the alternate entrance of the PW Conservatory. 
If you have seen pictures of Kew, you have surely seen the ultra-famous Palm House. This is a rather extraordinary building originating in the mid-early 19th century. The view from across the pond is amazing because you can see the fountain in the center and the whole shape of the house. Inside, you can find a variety of tropical trees (mostly palms) but also eucalyptus, cacao, and betel nut (actually, the betel nut might also be a palm, but I’m not sure) :). Under the Palm house is a small aquarium displaying aquatic plants alongside fish and other marine life as they would in the wild. Raisa and Mom spent loads of time down there, but up above is much more special. A beautifully designed winding staircase leads you up into the elevated walkway, where you can see the tops of the trees in the Palm House. It is totally gorgeous and the architecture is perfect and majestic. Through the windows you can also see over the Waterlily House and the pond. We spent some good time up there. 
One other place I enjoyed was the Waterlily House because it was so symmetrical and the lily pads were ENORMOUS!!! It was rather small, but it contained a huge variety of complementary flowers and hanging baskets of carnivorous plants. The waterlilies were blooming and they were incredibly colorful and great.
If you plan on going in the next few weeks, make sure to take a rickshaw ride tour because I ended up learning so much about cinnamon. If you didn’t know, Kew is about to end it’s Spice exhibit, and I thought it was great. As part of the exhibit, you can take a rickshaw ride that will teach you all about a certain spice of your choice. 
I only had one single disappointment about Kew. The Temperate Glasshouse was closed for the next two years. I was really looking forward to it, but I know that when I come back someday, I will be able to see it fully restored. It is a massive building, so I guess I missed out on a lot. Overall, though I am really happy with the experience I had.