Idukki district in the context of "Anamudi"

Coimbatore district is one of the 38 districts in the state of Tamil Nadu in India. Coimbatore is the administrative headquarters of the district. It is one of the most industrialised districts and a major textile, industrial, commercial, educational, information technology, healthcare and manufacturing hub of Tamil Nadu. The region is bounded by Tiruppur district in the east, Nilgiris district in the north, Erode district in the northeast, Palakkad district, Idukki district and small parts of Thrissur district and Ernakulam district of neighbouring state of Kerala in the west and south respectively. As of 2011, Coimbatore district had a population of 3,458,045 with a sex ratio of 1,000 and literacy rate of 84%.

Coimbatore district was part of the historical Kongu Nadu and was ruled by the Cheras as it served as the eastern entrance to the Palakkad Gap, the principal trade route between the west coast and Tamil Nadu. Coimbatore was in the middle of the Roman trade route that extended from Muziris to Arikamedu in South India. The medieval Cholas conquered the Kongu Nadu in the 10th century CE. The region was ruled by Vijayanagara Empire in the 15th century followed by the Nayaks who introduced the Palayakkarar system under which Kongu Nadu region was divided into 24 Palayams. In the later part of the 18th century, the Coimbatore region came under the Kingdom of Mysore and following the defeat of Tipu Sultan in the Anglo-Mysore Wars, the British East India Company annexed Coimbatore to the Madras Presidency in 1799. The Coimbatore region played a prominent role in the Second Poligar War (1801) when it was the area of operations of Dheeran Chinnamalai. In 1804, Coimbatore was established as the capital of the newly formed Coimbatore district. The district experienced a textile boom in the early 19th century due to the decline of the cotton industry in Mumbai.

The Indian state of Kerala is divided into 14 districts. Districts are the major administrative units of a state which are further sub-divided into revenue divisions and taluks.

Idukki district is the largest district in Kerala with a total land area of 4,61,223.14 hectares.

The Kingdom of Travancore (/ˈtrævəŋkɔːr/), also known as the Thiruvithamkoor Kingdom (Malayalam: [t̪iɾuʋid̪aːŋɡuːr]) and Travancore State, was a kingdom that lasted from c. 1729 until 1949. It was ruled by the Travancore royal family from Padmanabhapuram, and later Thiruvananthapuram. At its zenith, the kingdom covered most of the south of modern-day Kerala (Idukki, Kottayam, Alappuzha, Pathanamthitta, Kollam, and Thiruvananthapuram districts, major portions of Ernakulam district, Puthenchira village of Thrissur district) and the southernmost part of modern-day Tamil Nadu (Kanyakumari district and some parts of Tenkasi district) with the Thachudaya Kaimal's enclave of Irinjalakuda Koodalmanikyam temple in the neighbouring kingdom of Cochin. However Tangasseri area of Kollam city and Anchuthengu near Attingal in Thiruvananthapuram were parts of British India.

Malabar District of Madras Presidency was to the north, the Madurai and Tirunelveli districts of Pandya Nadu region in Madras Presidency to the east, the Indian Ocean to the south, and the Arabian Sea to the west.

Palakkad district (Malayalam: [pɐːlɐkːɐːɖɨ̆] ) is one of the 14 districts in the Indian state of Kerala. It was carved out of the southeastern region of the former Malabar District on 1 January 1957. It is located at the central region of Kerala and is the second largest district in the state after Idukki. The town of Palakkad is the district headquarters. Palakkad is bordered on the northwest by the Malappuram district, on the southwest by the Thrissur district, on the northeast by Nilgiris district, and on the east by Coimbatore district of Tamil Nadu. The district is nicknamed "The granary of Kerala". Palakkad is the gateway to Kerala due to the presence of the Palakkad Gap, in the Western Ghats. The 2,383 m high Anginda peak, which is situated in the border of Palakkad district, Nilgiris district, and Malappuram district, in Silent Valley National Park, is the highest point of elevation in Palakkad district. Palakkad town is about 347 kilometres (216 mi) northeast of the state capital, Thiruvananthapuram.

The total area of the district is 4,480 km (1,730 sq mi) which is 11.5% of the state's area which makes it the second largest district of Kerala. Out of the total area of 4,480 km (1,730 sq mi), about 1,360 km (530 sq mi) of land is covered by forests. Most parts of the district fall in the midland region (elevation 75–250 m or 246–820 ft), except the Nelliampathy-Parambikulam area in the Chittur taluk in the south and Attappadi-Malampuzha area in the north, which are hilly and fall in the highland region (elevation > 250 m or 820 ft). Attappadi valley of Palakkad district, along with the Chaliyar valley of the neighbouring Nilambur region (Eastern Eranad region) in Malappuram district, is known for natural Gold fields, which is also seen in other parts of Nilgiri Biosphere Reserve.