A: 24/12 Vienna (open 01/12)

hertzyabazas

https://www.wien.info/en/now-on/winter-in-vienna/vienna-adventcalendar

Every day from December 1-24, you will have the opportunity to test your knowledge of Vienna at Christmas time and win some fantastic prizes. The main prize is a trip to Vienna for two people and will be drawn on December 24. 

You can already sign up for the reminder now. You will receive a daily reminder by email from December 1-24 so you don’t miss out on any giveaways

npor23

Day 1: "Today’s prize is a Vienna-themed thermos flask."

sarah250187

Answer for day 1- Vanillekipferl

tamalyn

day 2 - vienna

Lucky1983

Today’s Vienna-themed prize is an original snow globe.

Moneybot

Day 3

https://www.wien.info/en/now-on/winter-in-vienna/vienna-adventcalendar/3-door-790574

Today you can win a Vienna Edition notebook, pen and cotton carrier bag

The answer is not 5th avenue nor The Champs-Élysées couldn't cut and paste before it took me to registration page

Sophie56

Day 4 -  Two espresso cups and two foldable coffee-to-go mugs
Door #4 - vienna.info

The first picture (on mine) with a slightly green roof

Sophie56

Day 5 - Cotton Tote and two Foldable Mugs
Door #5 - vienna.info
November

Moneybot

Day 6

Today’s Vienna-themed prize is an original notepad with ballpoint pen and a cotton tote bag.

https://www.wien.info/en/now-on/winter-in-vienna/vienna-adventcalendar/6-door-790640

Christmas Tree

Sophie56

Day 7 - Practical Travel set
Gustav Klimt

Door #7 - vienna.info

Sophie56

Day 8 - Espresso Cup Set
Answer: At the Christmas Market
Door #8 - vienna.info