Mysteries in our national parks

While visiting the Everglades National Park with their parents, the Landon children uncover the mystery of dying manatees and learn important lessons about the natural environment.

Visiting Zion National Park with his family, twelve-year-old Jack encounters two mysteries, the strange behavior of a band of wild mustangs and the possibly sinister actions of his new foster brother, a Shoshone boy.

The Landon family makes a trip to Death Valley National Park accompanied by a mysterious new foster child, fourteen-year-old Leesa Sherman.

Jack, Ashley, and their unreliable new foster sister set out to solve the mystery of why whales are beaching themselves at Acadia National Park. While investigating mysterious strandings of whales in Maine's coastal Acadia National Park, the Landons are joined by 14-year-old Bindy Callister, a temporary ward. When Jack, Ashley, and Bindy find a baby humpback whale stranded in a tidal pool, Bindy suspects who's responsible, but she's too scared to...

"Snowmobiles are impacting the wolverine population at Denali National Park. And the Landons are there to help figure out why. Panic grips the Landon kids and 13-year-old Nicky Milano as they realize thay have been abandoned in the wilds of Alaska's Denali National Park. As they huddle together agianst the cold, they hear a deafening roar. Avalanche! If someone doesn't find them soon, they will freeze to death. Can they figure out a way to escape...