We're starting with our first day in the UK, we headed down to London on the train and found this beautiful and magical place called "Butterfly Jungle". It's on the same grounds as the Natural History Museum and the cost is reasonable - 6 pounds for adults and 4 pounds for children which includes a donation to the museum(which is free to get in).
When you enter it's like going inside a tropical paradise along with the intense heat and humidity, walking through the butterfly trail, the butterflies are everywhere and you can literally get within inches of them with your camera to get photographs. Take a seat on the far side near the feeding station and if you're lucky they will actually land on you!
Need an escape from the heat, you can pop outside to the jungle play area, it's small but big enough to let the kids blow off some steam whilst you take a break for a few minutes.
Back inside you can look through the windows of the butterfly house and see butterflies actually emerging from their pupae before finishing along the end of the butterfly trail and heading back outside. Definitely worth a visit and one of our favorite places to visit during our trip.