引き取り手のない(ひきとりてのない)死体が(したいが)たくさん捨てられている(すてられている)場所(ばしょ)

To shield himself from the rain and wind, the servant stealthily climbed the stairs leading to the second floor of the gate. The second floor was a place where many unclaimed corpses were abandoned. When he reached the top, he saw a small light in the darkness and sensed that someone was moving.