This hop on-hop off boat offers excellent value for money. You can enjoy unlimited cruising and sightseeing for a full day, or even two full days. Stay on board for as long as you want. And use the seven stops throughout the city center to hop on and off as often as you like. Your ticket also includes free entry to the Gassan Diamond Factory. Children up to 4 years old may join for free. And there is a nice discount for older kids. Free rescheduling and cancellation are available up to 24 hours in advance.