Rhyfeddodau'r Byd

Grand Canyon

Mount Everest

Great Barrier Reef

Amazon River

Sahara desert

Niagara Falls

Victoria Falls

Mariana Trench

Himalayas

Amazon rainforest

Arctic

Antarctica

Dead Sea

Galápagos Islands

Yellowstone National Park

Saharan Atlas

Iguazu Falls

Aurora borealis

Rainforest

Coral reef