Stratobowl
Stratobowl, Natural landmark in United States of America
The Stratobowl is a deep natural depression in the Black Hills of South Dakota.
It was from here that the first manned high-altitude balloon flights took place in the 1930s.
A yearly event called 'StratoFest' celebrates the region's aviation history.
Hiking to the Stratobowl offers stunning views and is accessible year-round.
The location was pivotal in establishing the National Geographic Society's stratospere flights.
Location: South Dakota
Source: Wikimedia