When speaking of trends, people tend to relatives arguments due to their fragile demonstrability. To prepare this chapter, we began with two objectives: first, to analyse trends in the tourism sector and their evolution, and secondly, in juxtaposition, to examine tourism trends from a socio-demographic perspective. Our goal is to deepen our understanding of two types of tourism that are both future trends in the tourism sector, namely, senior tourism and accessible tourism. This paper does not seek to review market niches or narrow market segments, but rather the opening of new tourism segments based on the synergies that can be generated between these segments based on both the potential and real needs of tourists. Accessibility is established as the key link, as older people and people with temporarily or permanently restricted capacities are the direct beneficiaries of accessibility. Indeed, accessibility is considered to be a parameter of quality and usability for tourist attractions and is, therefore, a key determinant of user satisfaction and loyalty. Also, we must not forget that disability is often directly related to the elderly and that, "with increasing age, disability or restricted capacities also increase in a gradual way" (Burnett, 1996:7).