Question: What is the name of one of the holiest places in India to Hindus that used to be accessible via the MG Ganga Kavery Express?
Context: Nagulamadaka is a small village in the state of Andhra Pradesh in India.  This is considered to be one of the holiest places for the devotees of Lord Subramanya (Younger son of Lord Shiva).  There are three main temples of Lord Subramanya and the idol in each temple is known with a name in each temple.  Lord Aadi (first) Subramanya is located in Kukke Subramanya temple, Lord Madhya (middle) Subramanya is located in Ghati Subramanya temple and Lord Anthya (last) Subramanya is located in Nagulamadaka Subramanya Swaami Temple.  Devotees worship Lord who is in the form of Seven headed snake.  This place is also known as Nagulamadake. The Shipra Express (Hindi: इंदौर - हावड़ा क्षिप्रा एक्सप्रेस Bengali: ইন্দোরে - হাওড়া শিপ্রা এক্সপ্রেস, Urdu:حافظة شبرا إكسبرس - اندر) (pronounced as Shiprã Express) is a tri-weekly super fast express train of Indian Railways, which runs between Indore Junction railway station of Indore, the largest city & commercial hub of Central Indian state Madhya Pradesh and Howrah, the commercial hub of Kolkata.  The name 'Kshipra' signifies the Shipra River, one of the holiest river of Hindus near Ujjain City. The Maqam al-Imam Al-Ḥusayn ibn ‘Ali (Arabic: مَقـام الإمـام الـحـسـيـن ابـن عـلي‎ ‎ ) is the mosque and burial site of Al-Husayn ibn ‘Ali, the Third Imam of Shia Islam, in the city of Karbala’, Iraq.  It stands on the site of the Mausoleum of Imam Husayn, who was a grandson of Muhammad, near the place where he was martyred during the Battle of Karbala’ in 680 C.E..  The tomb of Imam Husayn is one of the holiest places for Shi‘ites, outside of Mecca and Medina, and many make pilgrimages to the site.  Every year, millions of pilgrims visit the city to observe Ashura, which marks the anniversary of Imam Husayn's death. Rameswaram, (also spelt as Ramesvaram, Rameshwaram) is a town and a second grade municipality in the Ramanathapuram district in the South Indian state of Tamil Nadu.  It is located on Pamban Island separated from mainland India by the Pamban channel and is about 40 kilometres from Mannar Island, Sri Lanka.  It is situated in the Gulf of Mannar, at the very tip of the Indian peninsula.  Pamban Island, also known as Rameswaram Island, is connected to mainland India by the Pamban Bridge.  Rameswaram is the terminus of the railway line from Chennai and Madurai.  Together with Varanasi, it is considered to be one of the holiest places in India to Hindus, and part of the Char Dham pilgrimage. Guruvayur Sri Vishnu Temple is a Hindus temple dedicated to the Hindu god Guruvayurappan (a four-armed affiliation of the Hindus god Vishnu), located in the town of Guruvayur in Kerala, India.  It is one of the most important places of worship for Hindus of Kerala and is often referred to as Bhuloka Vaikunta.  which translates to the "Holy Abode of Vishnu on Earth". Rishikesh ("Ṛṣikeś/Hṛṣīkeśa") is a city, municipal council and a tehsil in Dehradun district of the Indian state, Uttarakhand.  Located in the foothills of the Himalayas in northern India, it is known as the 'Gateway to the Garhwal Himalayas' and 'Yoga Capital of the World'. : It is approximately north of the city Haridwar and southeast of the state capital Dehradun.  According to Census of India, 2011 Rishikesh had a population of 102,138 making it the seventh most populated city and the largest municipal council in the state of Uttarakhand.  It is known as the pilgrimage town and regarded as one of the holiest places to Hindus. Hindu sages and saints have visited Rishikesh since ancient times to meditate in search of higher knowledge. Shiv Ganga Express is an Indian Super-fast train of North Eastern Railway Zone Varanasi named after the two jewels of Varanasi: Lord Shiva and the Ganges river.  The main towns along the route are Allahabad and Kanpur. It was passed in 2002's Railway Budget and hence initiated its journey from 1 July 2002 It operates daily and covers a distance of 755 km from Manduadih railway station to New Delhi.  Shiv Ganga Express originally consisted of 24 ICF coaches which includes 1 First AC coach, 1 Second AC coach, 4 Third AC coach, 10 Sleeper Class coaches,5 General (Un-Reserved) coaches, Pantry Car and 2 SLR overall 24 coaches that makes it one of the longest trains in India.  Shiv Ganga Express is usually hauled by a WDM 3A Locomotive from Manduadih to Allahabad Jn and by a WAP 4 or a WAP 5 Locomotive from Allahabad Jn to New Delhi.  It is considered as the best train between New Delhi and Varanasi.  It has got a maximum speed of 110 kph .  It is one of the few Superfast trains which pass through Manduadih-Madho Singh-Allahabad section.  This train is now running with 22 LHB Coaches from 16 June 2015 which includes 1 First AC Coach (H1), 1 Second AC Coach (A1), 4 Third AC Coaches (B1-B4), 10 Sleeper Class Coaches (S1-S10), 3 General (Un-Reserved) Coaches, Pantry Car and 2 EOG (End-on Generator). Ganga Kaveri Express is a Bi-weekly Superfast train service operated by Indian Railways, connecting Chennai in Southern India to Chhapra in Bihar.  Inaugurated on 16 February 1977 by Kamalpati Tripathi, between Madras (now Chennai) and Varanasi, was terminating at Chennai Beach Station, from where MG Ganga Kaveri Express used to run to Rameswaram through the Kaveri river basin. The Chota Char Dham railway (Hindi: छोटा चार धाम रेलवे) is Indian Railways's proposed twin railway lines, will compliment the Char Dham Highway project by connecting the holiest places of Hinduism called Chota Char Dham, from the existing Doiwala station near Dehradun to Gangotri and Yamunotri via a fork at Uttarkashi and another set of twin rail links from the upcoming railway station at Karnaprayag to Kedarnath and Badrinath via a fork at Saikot.  The line is also of strategic military importance and has designated a national project. The Christian Quarter (Arabic: حارة النصارى‎ ‎ , "Ḥārat al-Naṣārā"; Hebrew: הרובע הנוצרי‎ ‎ , "Ha-Rova ha-Notsri") is one of the four quarters of the walled Old City of Jerusalem, the other three being the Jewish Quarter, the Muslim Quarter and the Armenian Quarter.  The Christian Quarter is situated in the northwestern corner of the Old City, extending from the New Gate in the north, along the western wall of the Old City as far as the Jaffa Gate, along the Jaffa Gate - Western Wall route in the south, bordering on the Jewish and Armenian Quarters, as far as the Damascus Gate in the east, where it borders on the Muslim Quarter.  The Christian quarter contains about 40 Christian holy places.  Among them is the Church of the Holy Sepulchre, one of Christianity's holiest places.  Most of its residents are Palestinian Christians, despite their dwindling numbers.
Answer: Rameswaram