Final answer:
The Barossa Valley region in Australia is renowned for powerful Shiraz-based wines.
Step-by-step explanation:
The Barossa Valley region is renowned for powerful Shiraz-based wines. Located in Australia, Barossa Valley is known for its warm climate and rich soils that are ideal for growing Shiraz grapes. Some of the most famous Shiraz wines from the Barossa Valley include Penfolds Grange and Henschke Hill of Grace.