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The main illustration on the obverse of all of the banknotes was the Chiremba Balancing Rocks in Epworth , Harare , which were used as a metaphor demonstrating the importance of balancing development and the preservation of the fragile environment .
 Chiremba Balancing Rocks, Epworth, Harare
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Chiremba Balancing Rocks, Epworth, Harare