After the Serengeti became a national park in 1951, its fame grew and soon people were travelling from all over the world to see the two million ungulates, 4,000 lions, 1,000 leopards, 550 cheetahs and some 500 bird species that populate this UNESCO World Heritage Site. Despite the park’s vast size, things are a little more crowded than when the Johnsons visited in 1928.

More than 350,000 people visit the Serengeti each year, often descending on the same spot when a wildlife superstar, like the leopard in this photo, is spotted.

Now discover the earliest ever photos of the world's national parks

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Then vs. now: see how famous tourist hotspots have evolved