The borderline between India and Sri Lanka is Adams Bridge (also called Ram Setu), a chain of limestone shoals in the Palk Strait.
How many border lines does India have?
India has a total of 15,106 kilometers of land borders with seven countries: Pakistan, China, Nepal, Bhutan, Bangladesh, Myanmar, and Afghanistan.
These borders include tricky bits like the Line of Control with Pakistan and the McMahon Line with China. Only five states—Haryana, Madhya Pradesh, Jharkhand, Chhattisgarh, and Telangana—don’t touch another country or the coast. Border security mixes physical barriers, fencing, and bilateral deals. Don’t forget India’s maritime boundaries stretch 7,516 kilometers along the Arabian Sea, Bay of Bengal, and Indian Ocean.
What’s the name of India’s border?
The shortest international border India has is with Sri Lanka—just 0.1 kilometers (about 62 meters) at Adams Bridge.
India’s other land borders are Myanmar (1,458 km), Nepal (1,752 km), Pakistan (3,310 km), China (3,488 km), Bangladesh (4,096 km), and Bhutan (699 km). The Sri Lanka border is special because it’s a natural limestone bridge linking Rameswaram Island (India) to Mannar Island (Sri Lanka). The 1976 Indo-Sri Lanka Maritime Boundary Agreement handles the maritime boundary instead.
When did the first Indo-Sri Lanka Maritime Boundary Agreement get signed?
India and Sri Lanka signed the first Maritime Boundary Agreement on March 23, 1976, setting clear sea boundaries in the Gulf of Mannar and Bay of Bengal.
This deal sorted out overlapping claims on continental shelves and exclusive economic zones. A second agreement in 1978 fine-tuned the Palk Bay boundary. Together they helped manage fishing rights, cut down conflicts, and boost maritime security. The International Maritime Boundary Line (IMBL) they created runs about 1,300 kilometers.
Who crossed the Palk Strait first?
Mihir Sen, an Indian barrister and businessman, became the first person to swim the Palk Strait in 1966.
Born in 1930, Sen swam 30 miles (48 km) from India to Sri Lanka in 13 hours and 45 minutes. That record-breaking swim earned him the Padma Shri, one of India’s top civilian honors. The Palk Strait sits between Tamil Nadu (India) and Sri Lanka’s Northern Province, notorious for rough waters and strong currents—making his swim seriously impressive. Since then, plenty of swimmers have tackled the crossing, including international open-water athletes.
What’s the name of the line between India and Nepal?
The border between India and Nepal is called the India–Nepal border, and it’s famously open and unfenced.
Stretching 1,770 kilometers, this is one of the few completely open borders worldwide—people can move freely between both countries. The Treaty of Sugauli, signed in 1815 between the British Raj and Nepal, set this up. The border cuts through the Himalayas, Terai plains, and river valleys. Even though it’s open, both countries run checkpoints for customs and security. No fences exist along most of it, reflecting the deep cultural and historical ties between the two nations.
What’s the name of the border between India and Myanmar?
The official name is the India–Myanmar border, and it runs 1,458 kilometers.
Most of today’s border was defined after Myanmar’s 1948 independence, based on old colonial lines like the Pemberton Line from 1834. It snakes through rugged mountains, including the Patkai and Chin Hills. India’s built fences along parts of it to stop smuggling and insurgent activity. The border links India’s Arunachal Pradesh, Nagaland, Manipur, and Mizoram to Myanmar’s Sagaing and Chin regions.
What’s the name of the line between India and Bhutan?
The border is called the India–Bhutan border, stretching 699 kilometers.
This border is peaceful and stable, thanks to strong bilateral relations. It was marked in stages between 1973 and 2006 through joint surveys and agreements. No fences exist—people and goods move freely. The border climbs through the Himalayas into high-altitude areas. Bhutan’s foreign policy follows its “Guidelines for India–Bhutan Bilateral Relations,” focusing on close defense and development ties with India.
How many countries are inside India?
India isn’t a patchwork of countries—it’s one sovereign nation. But it does share land borders with seven neighbors.
As a federal union, India has 28 states and 8 union territories. Its neighbors are Pakistan, China, Nepal, Bhutan, Bangladesh, Myanmar, and Sri Lanka. The total land border clocks in at roughly 15,106.7 kilometers—one of the world’s longest. India also boasts a 7,516-kilometer coastline along the Indian Ocean. That geography shapes everything from culture to trade across South Asia.
What’s the name of the border between China and India?
The border is called the McMahon Line, a boundary set in 1914.
The McMahon Line came out of the Simla Convention between British India and Tibet. China rejects it and claims all of Arunachal Pradesh as southern Tibet. That disagreement has sparked tensions and clashes, like the 2020 Galwan Valley standoff. Where the line isn’t agreed on, the Line of Actual Control (LAC) acts as the de facto border. The border stretches about 3,488 kilometers through the Himalayas, crossing high-altitude deserts and glaciers.
Why did India give Katchatheevu to Sri Lanka?
India handed over Katchatheevu to Sri Lanka in 1974 under the Indo-Sri Lanka Maritime Agreement to settle maritime boundary disputes in the Palk Strait.
Prime Minister Indira Gandhi signed the deal to draw clear sea boundaries and fishing zones. The tiny, uninhabited island had long been used by Indian fishermen to dry nets and launch trips. After the transfer, Indian fishermen lost access, sparking repeated fishing-rights clashes. Katchatheevu sits between India’s Rameswaram and Sri Lanka’s Delft Island, once part of the Adams Bridge chain.
Which ocean touches both India and Sri Lanka?
The Indian Ocean laps both coasts, with the Bay of Bengal to the east and the Arabian Sea to the west.
The Gulf of Mannar and Palk Strait separate Sri Lanka from India, while Adams Bridge (Ram Setu) once connected them. The Indian Ocean is the world’s third-largest and a vital shipping route. Both countries depend on it for fishing, tourism, and trade. The region sits in the Indo-Pacific, a hotspot for geopolitics involving India, China, and the U.S.
Does Sri Lanka have any volcanoes?
Sri Lanka has no active volcanoes and sits in a stable tectonic zone without major quakes or eruptions.
Geologically, Sri Lanka belongs to the Indian Plate, far from the plate boundaries where most volcanoes form. Its oldest rocks date back to the Precambrian era, and the terrain features ancient uplands and sedimentary plains. Minor geothermal activity has popped up now and then, but no eruptions have ever been recorded. That stability helps explain Sri Lanka’s rich biodiversity and steady environment compared to countries on tectonic edges.
Can you see Sri Lanka from Rameswaram?
On most days, Sri Lanka isn’t visible from Rameswaram—it’s 48 kilometers across the Palk Strait.
Rameswaram sits on Pamban Island in Tamil Nadu, separated from Sri Lanka’s Mannar Island by the Palk Strait. In rare conditions—crystal-clear air, low humidity, high visibility—you might spot a faint outline of Sri Lanka’s northern coast from the highest spots on Rameswaram. Adams Bridge (Ram Setu), a submerged limestone chain, lies between the islands. The Ramanathaswamy Temple, a major pilgrimage site, stands as a landmark here.
Is it possible to swim from India to Sri Lanka?
Yes—swimmers have crossed the Palk Strait from India to Sri Lanka, a 30–48-kilometer stretch depending on the route.
Mihir Sen did it first in 1966, finishing in 13 hours and 45 minutes. Since then, plenty of swimmers—Indian and international—have made the crossing. The swim is brutal: strong currents, sudden storms, and marine life make it one of the toughest open-water challenges. Most start near Rameswaram and aim for Talaimannar or Delft Island in Sri Lanka. The Palk Strait’s reputation for rough seas keeps it on the bucket lists of extreme athletes.
Can you walk from India to Sri Lanka?
No—Adams Bridge (Ram Setu) is mostly underwater now, so you can’t walk between the two countries.
Historically, this chain of limestone shoals and islands linked Rameswaram Island (India) to Mannar Island (Sri Lanka). But rising seas, erosion, and human activity have submerged most of it. Only a few shallow patches peek out at low tide. Geological and archaeological studies suggest Adams Bridge started disappearing around 1480 CE. Today, boats and planes are the only ways to travel between India and Sri Lanka.
Edited and fact-checked by the MeridianFacts editorial team.
