amphitheater
Lymington Open Air Sea Water Baths was created in 1833.
pop it open
There is small flap called as epiglottis. It closes the airway, as you swallow something. At other times it keeps the air way open. So that you should be able to breathe continuously.
The more stir in the air is called the wind.
The ones is madison montana
A stadium is a wide open space used for various activities (e.g. sports, concerts, etc.) enclosed by tiered seating for spectators. Stadiums may be open-air or roofed.
amphitheater
It depends which sport the ground is for- In an athletics or cricket ground it can be common, but for a football(soccer) game now it is rare in England
atlia
A stadium is a running track, open field, or the like partly or completely enclosed by rows of seats. Ancient Greek stadia consisted of a running track enclosed by a tiered horseshoe-shaped or U-shaped seating structure and were open-air spaces with no roofs. Modern stadiums can come in many different shapes and seating configurations and can be both roofed or open-air.
Aubade
The Globe Theater.
Amphitheatre
This is called weathering.
An air to open valve is a type of control valve that requires air pressure to be applied in order to open the valve. When the air pressure is removed, the valve will close automatically. This design is commonly used for safety-critical applications where a fail-safe operation is needed.
The open air market to all Greek cities was called Agora and every day life was taking place there. The Roman equivalent was called Forum.