stamping ground 
(North American also stomping ground)
noun
A place where someone regularly spends time; a favourite haunt: they fear that rich trendsetters will encroach on their favourite stamping ground it was my old stamping ground...
- Easter was spent relaxing away from the bustle of retailing but it was also a chance to return to an old stamping ground and see how South West Rocks has changed over the years.
- Nice too to see my old stamping ground, Northland.
- Cliff was delighted to be back on his old stomping ground and to be greeted by so many people.
Synonyms
hang-out, haunt, meeting place, territory, domain, purlieu, resort, den, retreat, favourite spot
informal hidey-hole
British informal local, patch, manor