When the philanthropist George B. Kaiser spearheaded the creation of this $465 million green space on Tulsa’s waterfront, he hoped to help unite the city, which has struggled with inequality. The 66-acre park, which is open to the public for free, includes playgrounds, gardens, a skate park, a BMX track, a concert venue and a number of restaurants. It also hosts a variety of public programming, from Zumba classes to family nature walks, furnished by a $100 million endowment. Designers also prioritized accessibility: the park is built to be ADA-compliant, and there are desensitization areas for individuals on the autism spectrum. —Wilder Davies