Nicknamed the Casa dels ossos (House of Bones) by locals for its skeletal facade, Antoni Gaudí's Casa Batlló is a must-visit modernist icon in the heart of Barcelona. Step inside the luminous space to discover its organic architectural shapes, stained glass windows, and striking features with the help of a dynamic audio-video SmartGuide.

Stroll down the elegant Passeig de Gràcia to reach Casa Batlló, taking some time to admire the mosaicked exterior of the building with its bone-like balconies and vertebral details. Then, bypass the lines out front and head inside, picking up a SmartGuide on your way in. This handy screen features video and augmented reality technology to let you visualize how the Batlló family lived in this unique space and what furniture once filled its warped and unusually shaped rooms.

Listen to engaging commentary about the design of the space and the life of architect Antoni Gaudí himself as you roam this 20th-century masterpiece. Walk through the residential noble floor, the window-filled attic, and the fabulous stairwell with its ornate carvings and clever skylights. On the rooftop terrace, snap photos of the detailed chimneys, whose patterns represent figures from mythology, before making your way down the grand main staircase to bring your journey into the past to a close.