For a taste of Hangzhou's modern skyline, head to United Plaza! This iconic skyscraper by the Qiantang River dazzles with color-changing glass facades that light up the night. Don't miss the 360-degree observatory on top – it offers jaw-dropping views of the river tides and cityscape. Pro tip: Capture the 'River of Lights' panorama at dusk when the neon reflections dance on the water!