A conservation group has donated 400 acres to Yosemite National Park. The area was previously private property before the group purchased it.

More information on the process of how this expansion came about:

Thanks to a generous land donation, Yosemite National Park will grow by an additional 400 acres of wetlands and meadow habitat on its western boundary. It is the largest planned expansion for the California park in nearly 70 years, said Tim Ahern of the group Trust for Public Land.

The San Francisco-based conservation group purchased the land, known as Ackerson Meadow, from private owners for $2.3 million earlier this year. On Thursday, Trust for Public Land donated the estate to Yosemite National Park.

Yosemite is the country’s fourth most popular national park, generating $535 million in economic benefits, according to the park. Located in California’s Sierra Nevada mountains, the park is home to Yosemite Falls, the tallest waterfall in North America, and rock formations such as Half Dome and El Capitan.

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