Not all theaters have a pit. Some smaller theaters may not have enough space for a pit, while some larger theaters may have multiple pits.
If a theater does have a pit, it is usually located under the stage. This allows the orchestra to be close to the actors and the audience, and it also helps to create a more immersive sound experience.
Some theaters also have a "fly pit" above the stage. The fly pit is used to store scenery and props that can be flown in and out of the stage.
The presence or absence of a pit can have a significant impact on the type of performances that can be held at a theater. Theaters with pits are typically used for musicals, operas, and other types of performances that require a large amount of music. Theaters without pits are typically used for plays, lectures, and other types of performances that do not require a lot of music.