anchor:  Formentera, Ibiza's diminutive neighbour just one hour's ferry-boat ride (or 25 minutes by hydrofoil) to the south, is an island apart in some ways more like a desert island than a satellite or outpost of Ibiza.
positive: Formentera is a one hour ferry-boat ride from Ibiza.
negative: Formentera is incredibly far from Ibiza, needing a three hour ferry-boat ride in order to arrive there.