Since the winter update 253.0 there is a bug located at 46.5 x 62.7
An invisible huge mountain was added to top of the ruins. You see the shadow of it on my pictures. There is no way to access the area without admin-clip, yet the stuff was not removed.
http://images.akamai.steamusercontent.com/ugc/198554627310601538/5E0E011582CAB4F2203F1DFEE3F3472BBA60976A/
http://images.akamai.steamusercontent.com/ugc/198554627310607819/40882A97EFB0E7AF03750D26895B5E4281C86939/
http://images.akamai.steamusercontent.com/ugc/198554627310607633/F626081BDC3A59BFBA05CAE2B6A1815E6EE5BC9B/
http://images.akamai.steamusercontent.com/ugc/198554627310607954/D4D8FC0153A748857C8873C8A263589FA6B53519/