Hamburg has a well-organized public transportation system, including buses, subways, and ferries that are all accessible with the same ticket. Tickets can be bought at the machines located in every subway station, on some buses, or at many newsstands throughout the city. You can also purchase tickets online or through the HVV app. Always remember to validate your ticket before boarding to avoid hefty fines. If you're planning to travel extensively in the city, consider buying a day or weekly pass for unlimited travel within the specified zones.