In centuries past, undertaking a journey meant a voyage into the unknown, traveling for months or years into unexplored areas on the map where cartographers could only speculate "There be dragons."
- ISBN10 1426204094
- ISBN13 9781426204098
- Publish Date 28 April 2009
- Publish Status Active
- Out of Print 5 May 2021
- Publish Country US
- Imprint National Geographic Society
- Format Hardcover
- Pages 304
- Language English