T. Boone Pickens' ranch was listed for $250 million in 2017: Photos

T. Boone Pickens, the famed oil prospector and famed hedge-fund founder, died on Wednesday, September 11 at age 91.

He was the owner of Mesa Vista Ranch, one of the most expensive properties in America.

In 2017, he put the ranch on the market for $250 million. No one has bought it yet.

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T. Boone Pickens, a famous oil prospector, hedge fund founder, and philanthropist, passed away on September 11 at age 91.

Pickens had a long, successful career in business. He founded the oil and gas company Mesa Petroleum and the hedge fund BP Capital Management.

Read more: T. Boone Pickens, the 'Oracle of Oil,' Republican donor, and billionaire philanthropist, dies at 91

In 2017, he made headlines for listing his 100-square-mile ranch in the Texas Panhandle, northeast of Amarillo, for a whopping $250 million.

Keep reading for a look inside.