The Difference is the Expert
Every Signature departure includes a National Geographic Expeditions Expert who travels with the group throughout. These are leading specialists in their fields, historians, scientists, conservationists, archaeologists, people who have spent careers understanding the places the itinerary moves through. They are not there to read from a script at each site. They are there to give the kind of context that transforms what you are looking at, connecting the history, the culture and the landscape into something that stays with you long after you get home.
It is the difference between seeing a place and understanding it.