Walk through two modernistic buildings with an architectural historian that will describe their design challenges in vivid detail. As futuristic as Torre Glòries tower is, its bullet shape resembles the steeples of Sagrada Familia, architect Antoni Gaudí’s famed but controversial basilica that has been under construction since 1882. Torre Glòries also has had its share of distractors, as the glass-covered, multi-colored building has been criticized for issues ranging from its small windows to awkward donut-shaped floor plan. However, seeing it in person with an informed architect will shed light on the tower’s design and how it was achieved. In the same vein, the quirky triangular Forum Building overcame initial design flaws to become an admired symbol of Barcelona’s urban renewal. The expert guide will point out its bold technologies and use of materials of alternating textures and patterns. Be sure to ask why much of the building is lifted off the ground. As you continue, you'll be led to the magnificent Sagrada Familia, where you'll have some free time to admire and contemplate its intricate façade and the beautiful surroundings. It's a truly remarkable piece of art. Finally, the tour culminates with an exterior visit to Barcelona's Cathedral, a stunning example of Gothic architecture, as you stroll through the historic Gothic Quarter. Embark on an unforgettable journey through Barcelona's treasures.