* Grand: A grand hippodrome suggests a large and impressive structure.
* Ancient: Describes a hippodrome from a historical period.
* Roman: For a hippodrome built in the Roman Empire.
* Spectacular: Highlights the exciting and impressive nature of races held there.
* Historic: Emphasizes the historical significance of the hippodrome.
* Thrilling: Refers to the excitement of the races held within.
* Dusty: If the hippodrome is old and neglected.
* Magnificent: A more poetic term for a grand and impressive hippodrome.
You could also use descriptive phrases like:
* The bustling hippodrome
* The historic hippodrome
* The well-preserved hippodrome
* The ancient, forgotten hippodrome
Ultimately, the best adjective or phrase depends on the context and what you want to emphasize about the hippodrome.