Direct answer
Ernakulam (part of Kochi) offers a mix of historic, cultural and natural sights: Fort Kochi, Marine Drive, Mattancherry Palace, Jewish Synagogue & Jew Town, St. Francis Church, Hill Palace Museum, Cherai Beach, Willingdon Island and local markets are must-sees.
Highlights and details
Fort Kochi
Marine Drive (Ernakulam Waterfront)
Mattancherry Palace (Dutch Palace)
Paradesi Synagogue & Jew Town
St. Francis Church
Hill Palace Museum (Tripunithura)
Cherai Beach
Willingdon Island & Port Areas
Kerala Folklore Museum
Local markets and food
Nearby day-trip options
Practical tips
Suggested short itineraries
If you want, I can create a personalized 1-day or 2-day itinerary, suggest restaurants, or map travel times from your hotel—tell me your interests and hotel area.