Barcelona is a city rich in heritage, showcasing a blend of Roman ruins, medieval architecture, and Catalan modernism, including several UNESCO World Heritage sites like Güell Park and Casa Batlló. Notable structures by architect Antoni Gaudí, such as Casa Milà and Palau Güell, reflect innovative designs and artistic genius, contributing to the city's fame. Additionally, Barcelona offers a wide array of hotels and accommodations for visitors, solidifying its status as a top travel destination.