Geography

The junction several miles outside of Nairobi:

White Highlands, of Nairobi: wiki --

• officially reserved for exclusive use of Europeans: 1902 - 1961
• originally restricted to land not less than 5,000 feet above sea level; better suited for Europeans;
• generally: between two points on the railway track
• explains why the opening scene in Out of Africa so iconic
• today: it is the heart of Kenya's economy
• cities:
• Nairobi
• Nakuru
• Eldoret
• Kitale
• Thika
• Kericho
• Nyeri
• covers only 5% of Kenya's total land area

Happy Valley, in the Aberdares:

• set in the White Highlands
• "established" by Joss Hay and his wife, when they moved there in 1924, page 2;

Wanjohi River: see chapter 15, "Letters from the Wanjohi"; Alice de Trafford, a former Joss lover;  

Aberdares, the Aberdare Range: mountain range north of Nairobi

• 100 miles long
• eastern rim of the Great Rift Valley, running north to south
• on the west: falls off steeply into the Kinangop Plateau and then into the Great Rift valley
• on the east: slopes more gently
• in the distance, can be seen:
• Lake Naivasha
• Mau Escarpment
• Mount Kenya, highest mountain in Kenya; lies east of the Aberdares Range

Oserian, wiki entry:

Oserian (Masai, "Place of Peace"; locally, The Gin Palace; later, Djinn Palace) is a flower farm on the south shores of Lake Naivasha, Nakuru County, Kenya.[1] It is Africa's largest rose producer.[2] Oserian's wildlife corridor is more than 1.6 km (1 mi) in width through its property with reaches to the lake; it occupies more than 6 km (4 mi) of shoreline.[3]