It's hard not to appreciate Lagoon Valley's natural beauty with the water, wildlife and sprawling hills and trails. It's part of the reason many Vacaville residents are saying "no" to a golf course and residential housing the city gave the go-ahead to build out here.
"It makes me very sad to think of over 1,000 houses being built on the other side of the lagoon. And will it impact this part? Of course it will," long-time resident Jacqueline Pelton said.
She's also a member of the Lagoon Valley Conservancy.
"It's the last place that could be saved as a separation between Vacaville and Fairfield," former long-time Mayor Dave Fleming said.
They're among those in the fight to prevent Lagoon Valley from becoming home to some 1,200 residential houses and a golf course.
Many residents have taken to social media, collecting signatures for a petition to stop the development.
And in solidarity, Facebook users are asking supporters to change their profile pictures to one of Lagoon Valley.
"You destroy the history of this valley," said Pelton, a retired teacher and principal, who remembers bringing her students to the area to witness its history first-hand.
"We walked over from a school in town, and one of the boys found an arrowhead, and he was absolutely thrilled," she said.
"I just feel that that valley shouldn't be developed. It's cut off from the rest of the city. They're gonna have to pump water over the hills to get it in there, and they're gonna have to pump the sewage over the hill to get it out of there," Fleming added.
But the city says the infrastructure surrounding a new development won't greatly impact those who enjoy Lagoon Valley.
"I think there's a misconception out there that the park is going to go away, all the hiking trails are gonna go away, and that's just simply not the case," City Spokesman Mark Mazzaferro said.
The area set to be developed is private property that outsiders don't have access to.
Still, many believe that once the area is developed, it will change the future of Lagoon Valley for generations to come.
"There are other places where they can put the houses. Just leave this one space alone. Leave it for posterity," Pelton added.