Confusingly there are two Congos - the Democratic Republic of Congo (aka the DRC) and the Republic of Congo (aka Congo-Brazzaville). The DRC is the size of Western Europe, stretching from the Atlantic to Lake Tanganyka and lying largely south of the eponymous river - it was most recently called Zaire and before that the Belgian Congo and the Congo Free State (although Free it was not). Congo-Brazzaville lies entirely north of the Congo River and is approximately a seventh of the size of its southern neighbour. Both countries have limited, although incredible, safari opportunities within the planet's second largest rainforest which runs through them both.
The DR Congo is a veritable wildlife cornucopia with such iconic endemics as Bonobo, Grauer's Gorilla, Okapi and Congo Peacock all surviving in the planet's second largest rainforest.
For the last quarter of a century naturalists and adventurers could really only look longingly in from afar - as a combination of political instability, a lack of infrastructure, deep-rooted corruption and centuries of commercial and colonial exploitation limited holistic development.
Happily, we now appear to be on the cusp of a real change and while a visit to this incredible country remains challenging, it is no longer impossible - you can see a sample trip here.
Several National Parks have survived the turmolt and are currently enjoying a new lease of life, foremost among them is the Virunga National Park, due to a combination of improved civil security and increased international interest.