Great Barrier Reef - large
The Great Barrier Reef is the largest reef (in the world).
The weather - good - in June.
The weather is better in June.
The weather is (the) best in June.
Nile River - long - Yangtze River
The Nile River is longer than the Yangtze River.
Mount Everest - high
Mount Everest is the highest mountain (in the world).
Victoria Falls - large - in the world.
Victoria Falls are the largest waterfalls in the world.
Kauai - beautiful - Hawaiian Island
Kauai is the most beautiful Hawaiian Island.
Canada - big - America
Canada is bigger than America.
Lake Baikal in Russia - deep - in the world.
Lake Baikal in Russia is the deepest lake in the world.
Copper Canyon - long - Grand Canyon
The Copper Canyon is longer than the Grand Canyon.
Canada - good - see the aurora.
Canada is the best place to see the aurora.
Summer - hot - spring
Summer is hotter than spring.
Mississippi River - wide - in America.
The Mississippi River is the widest river in America.
Other volcanoes - large - Paricutin Volcano
Other volcanoes are larger than the Paricutin Volcano.
The Pacific Ocean - big - the Atlantic Ocean
The Pacific Ocean is bigger than the Atlantic Ocean.