Kalapani or Kala Pani, meaning "Black Water" in Indo-Aryan languages, may refer to:

Look up कालापानी in Wiktionary, the free dictionary.

• Kalapani River, one of the headwaters of the Kali River on the border between India and Nepal
• Kalapani territory, a disputed territory between India and Nepal under Indian administration
• Kalapani, Bhopal, a village in Madhya Pradesh, India
• Kala Pani, also known as Cellular Jail, a colonial-era prison in India
• Kala Pani, Pakistan, a village in Abbottabad, Pakistan

• Kala Pani (1958 film), a 1958 Indian film (Hindi) about the Kala Pani prison
• Kaalapani, a 1996 Indian film (Malayalam) about the Kala Pani prison
• Kaala Paani, a 2023 Indian television series.
• Kalapaani, an unrealized Indian film by Mahesh Bhatt, starring Ajay Devgan and Sunil Shetty

• Kala pani (taboo), a taboo of the sea in Indian culture
• Kalapani (Indian expatriates in UK), Indian expatriates who went to UK during the 17th, 18th and 19th centuries

• Blackwater (disambiguation)

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