not only as an Austrian you are sometimes craving sausages - the "Wurst Case" Car parked in front of Diviera Drive is as photogenic and good as the place itself!
I love this excellent independent arthouse theater in the Lower East side. Metrograph projects archive quality 35mm and independent films. Tastefully decorated, there is also a candy store, bookstore and restaurant.
This is a pro tip, but also a summer tip, take the ferry from Lower Manhattan to Rockaway and spent the day. The beach is great and the area is impossible to gasp that it's 30 min from Manhattan (without traffic) - Eat as many tacos you can, cause it's the best in the state of New York!
Arthur Avenue is a mainstay of the Bronx. Since the early 1900's til today, it's been the hub of the Italian-American community that calls the Bronx home. Many family-owned, traditional businesses dot the main avenue, and the food culture is rich and boisterous.