#7. Hearst Castle If you’ve ever seen Citizen Kane, you’ll know why this is a big deal. Built in 1919 (well started in 1919 finished in the 40s), Hearst Castle is a standing testament to an era before income tax. The mansion was constructed for William Randolph Hearst, a newspaper magnate, and captures the essence of the extreme decadence of the American imperial era. This building is amazing to see in person, there are three buildings in total Casa del Mar, Casa del Monte, and Casa del Sol, each filled with unique decoration and amenities including several pools, a full cinema, and a zoo. If you are at all an architecture nerd, like myself, you will love the mixed themes and unique designs (many of them based off of the most ornate and beautiful buildings in Europe) that these buildings have to offer. Hearst Castle was a Mecca for the American elite in the 20s and 30s, and though you no longer need an invitation to enter, it is still very capable of inspiring that exclusive privileged feeling when you visit.