So far I’ve seen…

(in the United States)
Cape Cod
the Cascade Mountain Range
Crater Lake
Death Valley
Diamond Head Crater
Florida Everglades
Grand Canyon
Great Salt Lake
Mohave Desert
New England Autumn Colors
Olympic National Park
Orca Whales
Petrified Forest
Yellowstone

(in Puerto Rico)
El Yunque

(in Tanzania)
Great Rift Valley
Mt Kilimanjaro
Ngorongoro Crater
Olduvai Gorge
Serengeti National Park

(in the Cayman Islands)
Hell
Seven Mile Beach

(in Brazil)
Sugar Loaf