Anaimalai Hills in the context of Tea plantation

Palakkad Gap or Palghat Gap is a low mountain pass in the Western Ghats between Coimbatore in the Indian state of Tamil Nadu and Palakkad in the state of Kerala. It has an average elevation of 140 metres (460 ft) with a width of 24–30 kilometres (15–19 mi). The pass is located between the Nilgiri Hills to the north and Anaimalai Hills to the south.

The Palani Hills are a mountain range in the southern Indian states of Tamil Nadu and Kerala. The Palani Hills are an eastward extension of the Western Ghats ranges, which run parallel to the west coast of India. The Palani Hills adjoin with the high Anamalai range on the west and extend east into the plains of Tamil Nadu, covering an area of 2,068 square kilometres (798 sq mi). The highest part of the range is in the southwest, and reaches 1,800-2,500 metres (5,906-8,202 feet) elevation; the eastern extension of the range is made up of hills 1,000-1,500 m (3,281-4,921 ft) high.

It is also home to the main temple of Murugan, who is worshipped as a major deity in Tamil Nadu.