Okay, let's kick things off with the absolute icon of Sydney, nay, Australia – the Sydney Opera House! This isn't just a building; it's a work of art. Designed by Jørn Utzon, this architectural marvel is instantly recognizable with its sail-like shells. But it's not just about the looks, folks. The Opera House is a thriving performance venue hosting everything from opera (duh!) to ballet, theatre, and concerts. You can take a guided tour to learn about its history and construction, or better yet, catch a show! Prices for shows vary wildly depending on what you’re seeing, ranging from around $50 for a smaller theatre performance to upwards of $300 for a big-name opera. Tours are usually around $40.