Like Austin, Raleigh is close to a prestigious state university and a profusion of high-tech jobs in the Research Triangle area.

FORBES: America's Fastest-Growing Cities

Turkey's actions deprived the coalition with a mechanized thrust into the Sunni Triangle area of Iraq-a powerful thrust that could have done much to inhibit the development of the insurgency there.

CENTERFORSECURITYPOLICY: Turkey's cozy business with Iran

Slightly farther afield, Sri Lanka's so-called "cultural triangle" - comprising the area bounded by Kandy, Anuradhapura and Polonnaruwa - hosts Sri Lanka's most celebrated archaeological and cultural sites, and four more of its Unesco World Heritage sites.

BBC: Sri Lanka��s architectural treasures

The facility, which would service new electric trains on the Great Western mainline, would be built in an area known as the railway triangle.

BBC: Bristol

Instead of housing and retail, parking lots for Mets fans would initially replace dozens of businesses in an area known as the Iron Triangle to the east of Citi Field.

WSJ: Plan Upends Willets Vision

The 16-square-block area surrounding Rodeo Drive is known as the Golden Triangle.

MSN: Top shopping in Los Angeles

U.S. forces nicknamed northern Babil and surrounding areas the 'Triangle of Death' due to the amount of combat the area experienced earlier in the Iraq war.

CNN: Part of Iraq 'Triangle of Death' back in Iraqi control

Obama is likely to capture votes in the Research Triangle, a thriving swath of counties in and around the Raleigh-Durham area filled with highly educated tech workers and medical researchers.

CNN: Polls: Clinton, Obama in tight race in Indiana