ULOG: La Pedrera, Barcelona

Nested among the urban streets of Barcelona are some unusual and beautiful buildings by infamous architect Antoni Gaudi. His unique approach to the Art Nouveau movement generated some of the most creative buildings the world have ever seen. And La Pedrera is no exception.

One of the most imaginative houses in the history of architecture, this is more sculpture than building. The façade is a varied and harmonious mass of undulating stone that, along with its forged iron balconies, explores the irregularities of the natural world. The United Nations Educational, Scientific and Cultural Organization (UNESCO) recognised this building as World Heritage in 1984.