Traditional tourism suffers from several problems that make it urgently need to change its current practices. As a promising revolutionary technology, Blockchain solves many of these problems, providing solutions such as trust, cost reduction, and decentralization. Moreover, smart cities use advanced technologies to improve the sustainability, efficiency, and quality of life for their residents and tourists, while incorporating innovative data and infrastructure management solutions, which is a major boost to tourism and is reshaping the landscape of tourism. This document will explore the realm of blockchain technology, highlight its benefits, and examine its potential influence on intelligent tourism within the context of smart cities, while also acknowledging the obstacles it encounters.