"The Serpentine Galleries are a must-see for contemporary art lovers. Located in a former teahouse, the original Serpentine Gallery continues to champion cutting-edge modern art, and if you walk across Serpentine Lake, the collection extends to the new Sackler Gallery, which was designed by Pritzker Prize–winning architect Zaha Hadid. Take the time to explore the grounds, including the Gallery’s Pavilion, which provides a site for architectural experimentation with temporary structures that is always worth checking out. "