Several recent events with large-scale (comparable with the solar disk diameter) chains emitting in the EUV and some other ranges are presented. The reality of this novel phenomenon of the large-scale solar activity is illustrated by the fact that the form and location of the chains coincide on different SOHO/EIT and TRACE images in the EUV lines as well as on some ground-based images. Similar to microwave chains, the EUV ones display a strong evolution at a time scale of hours especially during the CME activity. Such relationships between the chains and CMEs appear to be due to that both of them are caused by the evolution of the large-scale coronal magnetic structures. It is supposed in particular that the detected chains can light separators and quasi-separatrix layers forming on the boundaries of different interacting large-scale magnetic flux systems in the united complex and global solar magnetosphere.