The science center is open with free general admission this weekend courtesy of Fry’s Food Stores. Guests can explore the science center’s four levels and get discounted tickets for the giant screen theater and Dorrance Planetarium shows. Arizona Science Center, 600 E. Washington St., Phoenix. 602-716-2000 or azscience.org

The National Park Service turns 101 on Aug. 25, 2017. It’s also one of the 10 days this year that all National Park Service sites (more than 400 parks across the country) offer free admission to everyone. 

Other upcoming free admission days are Saturday, Sept. 30 (National Public Lands Day) and Veterans Day weekend, Nov. 11-12.

Arizona sites include the Grand Canyon, Lake Mead, Canyon de Chelly, Saguaro National Park near Tucson, Montezuma Castle in Camp Verde and many more.

Free Event: Live, colorful and traditional folklorico performances in the center court area of Desert Sky Mall, 7611 W. Thomas Road, Phoenix. 623-428-0995 or desertskymall.com/Events

One of the Valley’s oldest ranches reopens this month following a summer break. The 17-acre Historic Sahuaro Ranch features 13 original historic buildings and structures, a rose garden, barnyard and orchards. Lush grounds include citrus, figs, date palms, olives, apricots, peaches, pecans and grapes. Visitors will see peacocks, chickens and small animals. Activities, exhibits and guided tours keep the history of early settlement in the Valley alive. Hours are 10 a.m. to 2 p.m. Fridays and Saturdays, 1-4 p.m. Sundays through May.

Smithsonian magazine sponsors this day of free admission at participating local museums and cultural institutions nationwide. There are 20 participating museums in Arizona, including Cave Creek Museum, Pueblo Grande Museum, Desert Botanical Garden, Halle Heart Children’s Museum and Arizona History Museum. Times vary. Download and print free admission tickets in advance.  smithsonianmag.com/museumday