If you like the hustle and bustle of a market, you might want to head out to City Market in Nairobi Central and take in the atmosphere. Splash some more cash at Maasai Market.
If you like art, you might want to browse the collections at Nairobi Gallery in Nairobi Central. If you want to see more of the art galleries in Nairobi, Banana Hill Art Gallery isn't far either.
If you're planning a bit of sightseeing head to Kenyatta Mausoleum— just one of the monuments in Nairobi Central. You could also start your cultural experience by heading over to the museums in the area.