Tourism involves visits to destinations of choice for recreation, medical, or business purposes. This industry, which is considered as one with a fast growth rate, could generate a huge amount of revenue and employment if it is properly planned and managed. Future development plans for tourism in line with architectural heritage would bring more insights and create interest for present as well as future generations. Nigeria is blessed with treasures of architecture that can people to travel to the cities for tourism. As such, the need arises for architecture to step in and respond to the diverse needs of tourists, be them cultural, medical, or landscape needs. Hence, this research explores the role of architecture in promoting tourism that furthers economic development through the built environment in Nigeria. It is based on a qualitative research method. Data was primarily obtained through questionnaires and semi-structured interviews. Relevant literature was also studied in a bid to elucidate useful information on the subject matter. The findings showed the indelible mark of architecture on tourism growth and development. Although, the availability of tourism infrastructure and the attractiveness of these attractions remain inadequate and below average. The current research, therefore, concludes that modern tourism is closely linked to architectural development which could turn tourism in Nigeria into a key driver of socioeconomic development and growth, if considered.