Large-scale:
* Continents: North America, Asia, Africa
* Oceans: Atlantic Ocean, Pacific Ocean, Indian Ocean
* Mountain Ranges: The Himalayas, the Andes, the Rockies
* Deserts: The Sahara Desert, the Atacama Desert, the Gobi Desert
Medium-scale:
* Rivers: The Nile River, the Amazon River, the Mississippi River
* Lakes: Lake Superior, Lake Baikal, Lake Victoria
* Islands: Madagascar, Greenland, Iceland
* Volcanoes: Mount Everest, Mount Kilimanjaro, Mount Fuji
Small-scale:
* Canyons: The Grand Canyon, the Bryce Canyon, the Fish River Canyon
* Caves: Carlsbad Caverns, Mammoth Cave, Phong Nha-Ke Bang National Park
* Valleys: Yosemite Valley, Death Valley, Valley of the Kings
* Hills: The Seven Hills of Rome, the Cotswold Hills, the Black Hills
Other examples:
* Plains: The Great Plains, the Pampas, the Steppes
* Forests: The Amazon Rainforest, the Taiga, the Congo Basin
* Glaciers: The Greenland Ice Sheet, the Antarctic Ice Sheet, the Perito Moreno Glacier
* Coral Reefs: The Great Barrier Reef, the Belize Barrier Reef, the Red Sea Coral Reefs
It's important to note that these are just a few examples, and there are many other geographic features out there.