A Wanderer

     "They're centuries old. No one even knows if the race that built them still exists anymore. Only 2 others have ever been found and they were impossible.

     "The interiors were beyond anything the investigators could comprehend. They don't know if it's where the builders were so alien that their perceptions of reality were so drastically different from ours, or if the ships are some kind of dimensional gateways.

     "With the previous ships, members of the investigating teams were driven mad by whatever was inside."

                                                                                                                     -Athena to Beth in "Marathon's End"

One turns up in the next post.