Ocean cities are coastal urban areas that are located near large bodies of water, such as oceans or seas. These cities often feature beautiful beaches, vibrant marine ecosystems, and a variety of recreational activities like swimming, surfing, and boating. They serve as popular tourist destinations, attracting visitors with their scenic views and waterfront attractions. Many ocean cities also rely on industries related to the sea, such as fishing, shipping, and tourism. Examples of well-known ocean cities include Miami, San Diego, and Sydney. These cities often face challenges like rising sea levels and coastal erosion, which can impact their infrastructure and environment.