https://www.stephanskirche.at/

Vienna's most famous landmark in the heart of the city. It's an amazing cathedral and we recommend buying tickets inside for the Catacombs Tour (creepy and historic with lots of real bones) as well as the Tower Tours.

https://www.praterwien.com/startseite

Vienna's famous all-year amusement park, including the Riesenrad ferris wheel made famous by "The Third Man"

https://www.khm.at/

Vienna's Art History Museum. Johanna's favorite museum in Vienna (Terence should probably go at some point). Located in an amazing plaza that alone is worth the trip.