Hilly Serifos welcomes walkers with its network of ten signposted trails of varying lengths and difficulty. Good trail info is found on the Hiking page of http://serifos-greece.com; the Terrain map of Serifos is a boon.
Diving around Serifos is varied and exciting, with wrecks and flooded mines to explore. Serifos Scuba Divers runs diving and snorkelling trips and acts as the main watersports centre in Livadi. Flyboarding and boat rental also available.
Livadi has the best selection of accommodation, with a few options up in Hora and an excellent boutique hotel overlooking Vagia Beach.
There's a smattering of waterfront tavernas in Livadi and a few restaurants in Hora. The most popular beaches tend to have at least one taverna.