Viking City of the Dead
- Episode aired May 15, 2018
- TV-PG
- 42m
The lost fortresses of the Viking Age in today's Denmark. Why were they built and what caused the Viking Age to end?The lost fortresses of the Viking Age in today's Denmark. Why were they built and what caused the Viking Age to end?The lost fortresses of the Viking Age in today's Denmark. Why were they built and what caused the Viking Age to end?