What is the fine-grained topic of the following text: In the centre of the Gardens, there lies a fossilized tree trunk estimated to be 20 million years old.Also visit Ooty Lake which is surrounded by groves of Eucalyptus trees with a railway line running along one shore.Later, drive to Coonoor and visit Sims Park and Dolphin Nose Point.Overnight stay at hotel. Only return the topic.
Tourist attractions in Ooty and Coonoor