It is area between the house of the Prophet (sws) and his minbar that has been attributed to the prophet (sws) to have been declared as one of the gardens of Paradise.

The details can be found in the below link along with references to Ahadith that have a credible chain of narrators.

https://islamqa.info/en/answers/115693/the-area-between-my-house-and-my-minbar-is-one-of-the-gardens-of-paradise

Regarding the concept of Different Rewards w.r.t Different Places and Different times of the year, please refer to the videos provided in the following thread:

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