This was a laser show at Cheonggyecheon stream. On the picture you can see Haechi, a mytholocial character. It resembles a lion but in fact is a fire eating dog. Haechi is said to protect Seoul from fires, disasters and represents justice and good fortune.
The picture below is a dancing figure :)
And these are pictures of the Banpo Bridge at Hanyang river. Was amazing watching this <3 Thy even played songs as "You raise me up" with fitting water and light effects.