Hippos are a very popular animal to view on safari. Fortunately they are well represented in major safari areas containing water resources. Hippos make fantastic honking noises, and they are often observed making threat displays (hippo yawns) or having mock battles with one another. Hippo pools make a great location to stop for a picnic or sundowner as they provide great game viewing.
South Luangwa National Park in Zambia is an ideal place to see high densities of hippos packed into a river home. The Mara River in Kenya and Tanzania has great hippo viewing, and often interesting interactions with crocodiles or migration herds crossing the river. An interesting unusual view takes place at Katavi National Park in Tanzania where hundreds of hippos try to crowd into disappearing water areas late in the dry season. Northern Botswana has excellent viewing on the many channels and lagoons of the Okavango.
Other Areas of Note
Most major parks and game reserves that have good water resources.