Arrowcave

The "Arrowcave", as nick-named by John Diggle, is an underground lair for Oliver Queen,  that houses his equipment and costume for his vigilante persona, Arrow. It located beneath his night club, Verdant, which is used as a cover story to when he is down there. Oliver, John, and Felicity train down there. It also has a high-tech computer system, which Felicity normally uses, as well as training equipment in order for Oliver to keep fit day-to-day.