Three Sisters

Among quite a few other things, Three sisters could refer to the below. Please check the Three Sisters disambiguation page on en: wiki for a more exhaustive list.

Mountains

Australia

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  Category:Three Sisters, Blue Mountains, a rock formation near Katoomba, NSW, Australia

Canada

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  Category:Three Sisters, Alberta, three peaks in the Canadian Rockies near Canmore, Alberta
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  Category:Three Sisters, Elk Valley, three peaks in the Canadian Rockies just north of the town of Fernie, British Columbia

Poland

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  Three Sisters, a rock formation in Góry Bialskie (Bialskie Mountains), Eastern Sudetes

United States

• 
  Category:Three Sisters (volcanoes), Oregon.

Other

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  Category:Three Sisters (Chekhov), a play by Anton Chekhov
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  A rock formation in Monument Valley in Arizona
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  Three houses in Talinn
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  Girl triplets
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  Three bridges in Pittsburgh
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  Three Sisters (District of Columbia)