Parc Hauser, Public park in Le Havre, France.

Parc Hauser is a three-hectare park in Le Havre, set on a slope between the lower and upper town with a 62.15-metre elevation change and an average gradient of 15.5%. It is bordered by rue de Tourneville below and rue du 329e R. I. above. The grounds contain numerous artificial caves from which marl was extracted, and the early 19th-century Pavillon Ancel, later enlarged, retains its horseshoe staircase and rockwork-ornamented grottoes.

The land was once part of a medieval manor and was reshaped in the 1800s by a geographer who introduced exotic trees and designed the artificial caves. These botanical and landscape changes became the foundation for the park as it exists today.

The park is named after the Hauser family, who owned the estate after the geographer Jean-Baptiste Benoît Eyriès laid out the grounds and planted exotic trees such as cedar of Lebanon, sequoia and ginkgo. The early 19th-century Pavillon Ancel, later enlarged, now houses municipal services and keeps its horseshoe staircase and rockwork-ornamented caves.

The park lies between Rue de Tourneville at the bottom and Rue du 329e R. I. at the top, on the boundary between the lower and upper town. Its 62.15-metre drop over a 3-hectare site gives an average slope of 15.5%, so expect steep sections on the way up.

The park's artificial caves are former marl quarries dug into the slope, and the 62-metre drop between the rue de Tourneville below and the rue du 329e R. I. above gives an average gradient of 15.5%. The Pavillon Ancel, built in the early 19th century, keeps its horseshoe staircase and rockwork grottoes.