The roads running through San Francisco are famous (or infamous) for how steep they are. You better believe San Francisco is hilly!
The proper adjective is San Franciscan.
Parts of Australia's deserts are flat and others are hilly.
Flat
flat
The opposite of hilly is flat or level.
flat in the north (near the sea) to mountained in the south (part of the Alps)
San Francisco does not have mountains within the city limits. However, the city is surrounded by hilly terrain, with prominent peaks such as Twin Peaks and Mount Davidson providing scenic views of the area.
is golden sands hilly or flat
Extremely flat
relatively flat
Greece is mostly hills and mountains.
San Francisco houses are close together due to the city's history of limited space and high population density. The city's hilly terrain and early urban planning decisions also contributed to the close proximity of houses.