Villages dot the mountainous countryside, with larger settlements as ports and/or marketing and administrative centers. Homes and shops cluster around one or more main village squares or plateia . Numerous earthquakes plague the Ionians; in some areas, over 90 percent of the homes and other buildings have been destroyed by quakes in this century. Private homes are generally surrounded by a wall; the yards often overflow with flowers and herbs. In some rural areas, animals such as goats, sheep, chickens, and donkeys are kept in Structures attached to the home.