2.  Southern part of north America  Atlantic ocean and Apallachian mountains on east  Pacific ocean and Cordilleria on west

3. The Appalachians span over a distance of 1,600 miles, ranging across 14 states, right from Newfoundland in the North, to Alabama in the South. The Appalachians are the oldest chain of mountains in the North American continent. This mountain range derives its name from the Apalachees - an Indian tribe inhabiting this region. Mount Mitchell, with a height of 6,684 ft is the tallest mountain in the Appalachian range. The Appalachians have rich deposits of coal, iron, petroleum, and natural gas.

6.  Volcano National Park is located on the “Big Island,” Island of Hawaii. The national park features two active volcanoes known as Kilauea and Mauna Loa. Kilauea is often recognized as the most active volcano in the world. Mauna Loa is considered the most massive volcano in the world. Collectively they are without question the most active volcanoes in the world.

9.  Mammoth Cave National Park is located in Kentucky and is recognized as the longest cave system in the world. There are over 630 km of passageways throughout the cave system.

11.  Death Valley National Park is located in California and is part of the Great Basin of the United States. Death Valley is home to the lowest, hottest, and driest spot in the US. The highest temperature ever recorded in the world was 56.7 °C in Death Valley, California on July, 10, 1913. 

14.  It is the largest supervolcano on the continent. The geothermal features, waterfalls, different ecosystems, and wildlife combine to create a phenomenal encounter with nature.

17.  Also known as Denali, Mount McKinley is the tallest mountain in the United States reaching a peak of 6,194m.

19. Monument Valley is a region on the border between the states of Arizona and Utah which contains breathtaking landscape. It is not an actual valley; Monument Valley is basically flat land but contains small red sandstone hills that go hundreds of feet into the air, creating beautiful scenery.

21.  It is the largest subtropical wilderness area in the United States. Slow moving river and marsh lands are home to 36 different endangered species. Everglades National Park is located in the southern region of Florida. Wildlife features more than 40 species of mammals, 50 species of reptiles, 300 species of fish and 350 species of birds.