Personally feel that this is a good attraction, very happy is free, worth a visit. The first is the historical significance, the address of the first oil well, and the second is that the design of the big oil bubble is very good! Beautiful and exquisite, fully show a drop of oil in various forms, you slowly move around the big oil bubble, see the small oil bubble mapped on the big oil bubble, will find the small oil bubble really like moving, there are different forms of change, so fun!