Arrecife is Lanzarote's capital and a vibrant cosmopolitan city.
If you like a bit of history, then Arrecife is the place. El Charco de San Gines is another interesting place, a green lagoon bang in the middle of the city.
If you like lazing on a beach, then Playa del Reducto is an urban beach popular with families and hold a Blue Flag tag. Another beach but a contrast from Playa del Reducto is Playa del Cable, which is quiet, isolated and a great place to have a beach to yourself.
If you like shopping, then Arrecife is the place to buy designer wear at low prices. Arrecife Market is another place to bargain hunt.