There are several interesting small settlements to visit in Svalbard.
Longyearbyen the administrative center is a Norwegian small town with 2100 inhabitants from 51 nations. At Isfjord Radio you'll find a boutique hotel and gourmet restaurant out in the wilderness along Isfjorden. Ny-Ålesund, the northernmost settlement in the world, is a research station on 79 degrees north.
In Svalbard, there are only 40 km of roads. There are no roads between Longyearbyen and the other settlements, and it is therefore not possible to drive a car between the settlements.
Except for Ny-Ålesund which to which there are only guided boat trips in the summer season, all of these settlements can be visited, and you will need to go either by snowmobile in winter or boat during summer on organised guided trips to visit them.