Grand Canyon
The Grand Canyon was a large geological formation in Arizona, USA on Earth.

Captain Archer asked T'Pol in 2151 whether she had visited the Grand Canyon or the Big Sur Aquarium during her time on Earth. She had not, stating that sightseeing was not part of her assignment. ()

While surveying an uninhabited planet in 2152, 's initial scans discovered a gorge on the southern continent five times deeper than the Grand Canyon. ()

Kathryn Janeway and her  hiked the north rim of the Grand Canyon when the former was nine years old. He used to refer to it as "Earth's biggest ditch."()
 
In 2377, when Seven of Nine believed she was dying, the Grand Canyon was among the many fascinating places on Earth she wanted to see, but thought she never would. She looked at pictures of it in astrometrics with Captain Janeway, who recalled that her father called it the biggest ditch on Earth. ()

While the  crew was temporarily grounded on Earth in 2382, D'Vana Tendi and Sam Rutherford went to see the Grand Canyon. ()

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Earth geography