Your grandparents decided to hike the Sonora Desert in Saguaro National Park. The whole park is inside the desert.
The park is named for the large number of Saquaro cacti in the desert.
Sign pointing to the start of the Cactus Forest Trail.
Sign showing distances to different sites along the Cactus Forest Trail.
Grandpa Roy poses. Notice the small water bottle in his left hand.
Grandma Bert poses next to a giant Saguaro cactus, the largest species of cacti in the world. The Sonora Desert is full of them.
Grandpa Roy dying of thirst. He has taken his hat off to get just a little cooler in the hot, February (!) sun.
A view up a hill.
Grandma Bert on the Voksmarche trail. The hike your grandparents were on was a so-called Volkssport Year Round Event. It was a tad over 6 miles long and they ran out of water after only a couple miles.
Grandma Bert poses beside a Saquaro cactus that is not so large, yet.
Cane Cholla cactus.
Possibly Cane Cholla cactus.
Flowering Arizona Barrel Cactus.
Purple Prickly Pear Cactus.
Prickly Pear Cactus and flowering Arizona Barrel Cactus.
Many types of cacti bloom and even bear edible fruit.
The visitor center. It seemed a million miles away to Grandpa Roy.