According to Google maps: there’s no definite border (indicated by dashed lines) between the Kashmir region (located near both India & Pakistan) in which India considers the entire region as theirs but both China & Pakistan argue against India’s claim.

Plenty of places are disputed because they have natural resources or sit in strategically interesting locations.
But plenty of other place have nothing special to offer and are just disputed for stupid nationalist reasons.Kashmir is one of the latter. As always, the ones who suffer from the nationalist nonsense are the everyday Kashmiris trying to live a normal life.
And then there is this place: https://en.wikipedia.org/wiki/Bir_Tawil
Nobody wants to give up their connection to the Led Zeppelin song.
Short answer: British
Long answer: When India got independence from Britain, each province and princely state was asked to choose whether to join India (secular, Hindu-majority) or Pakistan (Muslim majority, with legal protections for minorities). Kashmir’s Hindu king decided to join India, even though its population was majority Muslim. Three wars later, most of Kashmir is now in India, while the westernmost part is under Pakistan. Politicians in both countries have sabre-rattled and done other stupid shit to inflame the situation.
The India-China dispute is because the British Empire promised that bit of land to both India and China. Now it’s controlled by China, as part of Tibet Autonomous Region.
You guys are talking to bots
What? Your link points to a 500 error




