As of April 1, 2018, MapleStory 2 has been online for 1000 days. To celebrate the festival, there are 3 times Adventurer Gallery adventurers can join. 

"We have opened the "Official Illustrations Hall" which displays the works of the Mette Designer!"

The Metu Gallery in Lees Harbor until April 25th. It is a video tour of the Metu Gallery:

If you play it, you can see it in a more beautiful screen!