Butterfly Museum in London

The Natural History Museum’s butterfly house is a specially constructed tropical enclosure on the Museum’s east lawn. Visitors can come face-to-face with tropical butterflies, including the swallowtail, blue morpho, the moon moth and many others.
This is a wonderful chance to learn, via close-up observation, about these creatures, and to immerse yourself in every stage of their brief, gorgeous lives.
Enjoy a fun family day out among hundreds of live butterflies and moths in our tropical butterfly house.
So what are you waiting for? Bring your kids and have some fun with these beautiful creatures.

http://www.nhm.ac.uk/visit/exhibitions/sensational-butterflies.html