Elsnir Castle

Elsnir Castle (古城) was an abandoned castle within Wall Rose that was investigated by the Scout Regiment.

Escape from Certain Death
Not long before the 57th Exterior Scouting Mission, the Scout Regiment was tasked with investigating Elsnir Castle. They were accompanied by a local of the area, but during their investigation, Titans invade and the floor of the castle gives way, forcing the surviving Scouts to escape the Titan-infested underground ruins. Eventually, most of the Scouts make it out alive.