On the southeastern end of the island, Marstal is Ærø's most modern-looking town and has a web of busy shopping streets at its centre. Marstal has an emphatically maritime history; even its street names echo the names of ships and famous sailors. The town's Søfartsmuseum has an absorbing collection of nautical artefacts, including ships' models and full-size boats. You'll find a reasonably good beach on the southern side of town.