Giraffe Cam at Elmwood Park Zoo
Lion Cam (Reid Park Zoo)
Orca Cam (mostly audio)
PandaCam at Zoo Atlanta
Penguins Live Cam at Detroit Zoo
Peter's Farm in Holland
Syngenta Research and Development Center (agriculture and technology)
WWII Museum (not free)
CERN particle collider
Glenn Research Center (NASA)
Mars (filmed by the Curiosity rover)
Syngenta Research and Development Center (agriculture and technology)
Turn Back the Clock / Museum of Science and Industry
Moose-Wilson Corridor (Wyoming)
Worthington House Virtual Tour at Monocacy National Battlefield
Acadia National Park (Maine)
Arches National Park (Utah)
Badlands National Park (South Dakota)
Big Bend National Park (Texas)
Black Canyon of the Gunnison National Park (Colorado)
Bryce Canyon National Park (Utah)
Canyonlands National Park (Utah)
Channel Islands National Park (California)
Olympic National Park (Washington)
Sequoia National Park (California)
CERN particle collider
Son Doong Cave in Vietnam (world's largest cave)