If you ask me, I would prefer to go each and every places in the list…
1.Amazon (South America)
The Amazon Rainforest, also known as Amazonia, the Amazon jungle or the Amazon Basin, encompasses seven million square kilometers (1.7 billion acres), though the forest itself occupies some 5.5 million square kilometers (1.4 billion acres), located within nine nations.
The Amazon represents over half of the planet's remaining rainforests and comprises the largest and most species-rich tract of tropical rainforest in the world. The Amazon River is the largest river in the world by volume, with a total flow greater than the top ten rivers worldwide combined.
It accounts for approximately one-fifth of the total world river flow and has the biggest drainage basin on the planet. Not a single bridge crosses the Amazon.
2. Angel Falls (Venezuela)
Angel Falls is the highest waterfall in the world, at 1,002 m, and is located in the Canaima National Park in Bolivar State, along Venezuela’s border with Brazil. It is more than 19 times higher than Niagara Falls. The uninterrupted descent of water falls 807 m
3. Bay of Fundy (Canada)
The Bay of Fundy is renown for having the highest tides on the planet (16.2 metres or 53 feet). One hundred billion tonnes of sea water flows in and out of the Bay of Fundy twice daily – more water than the combined flow of all the world’s fresh water rivers. Fundy’s extreme tides create a dynamic and diverse marine ecosystem.
The Bay is renown for its coastal rock formations, extreme tidal effects (vertical, horizontal, rapids and bores) and sustainable coastal development. It is also a critical international feeding ground for migratory birds, a vibrant habitat for rare and endangered Right whales, one of the world’s most significant plant and animal fossil discovery regions.
The Bay of Fundy is located between the Canadian provinces of New Brunswick and Nova Scotia on North America’s east coast.
4. Black Forest (Germany)
Black Forest (Schwarzwald) is a wooded mountain range in southwestern It is bordered by the Rhine valley to the west and south.
The highest peak is the mountain Feldberg with an elevation of 1,493 meters. The region is almost rectangular with a length of 200 km and breadth of 60 km.
5. Cliffs of Moher (Ireland)
Located in county Clare, the Cliffs of Moher are amongst the most impressive places to see in Ireland. The cliffs consist mainly of beds of Namurian shale and sandstone, with the oldest rocks being found at the bottom of the cliffs. One can see 300 million year old river channels cutting through the base of the cliffs.There are many animals living on the cliffs, most of them birds.
6. Dead Sea (Israel, Jordan, Palestine)
The Dead Sea is a salt lake between the West Bank/Palestine/Israel to the west and Jordan to the east. At 420 metres below sea level, its shores are the lowest point on Earth that are on dry land. With 30 percent salinity, it is 8.6 times saltier than the ocean.
7. El Yunque (Puerto Rico)
El Yunque National Forest, formerly known as the Caribbean National Forest, is located on the island of Puerto Rico. It is also the name of the second highest mountain peak in the Forest. El Yunque is the only tropical rain forest in the United States National Forest System.
8. Galapagos (Ecuador)
The Galapagos Islands are an archipelago of volcanic islands distributed around the equator, 965 kilometres west of continental Ecuador in the Pacific Ocean. The islands are all part of Ecuador's national park system. They are famed for their vast number of endemic species
9. Grand Canyon (United States)
The Grand Canyon, created by the Colorado River over a period of 6 million years, is 446 km long, ranges in width from 6 to 29 km and attains a depth of more than 1.6 km. During prehistory, the area was inhabited by Native Americans who built settlements within the canyon and its many caves.
10. Great Barrier Reef (Australia, Papua New Guinea)
The Great Barrier Reef is the planet’s largest coral reef system, with some 3,000 individual reefs and 900 islands stretching for 2,600 km over an area of approximately 344,400 square km. It is the biggest single structure made by living creatures and can be seen from outer space.
11. Halong Bay (Vietnam)
Halong Bay is located in Quáng Ninh province, Vietnam. The bay features thousands of limestone karsts and isles in various sizes and shapes. The bay has a 120 kilometre long coastline and is approximately 1,553 square kilometres in size with 1969 islets.
Several of the islands are hollow, with enormous caves, other support floating villages of fishermen, who ply the shallow waters for 200 species of fish and 450 different kinds of mollusks.
Another specific feature of Halong Bay is the abundance of lakes inside the limestone islands, for example, Dau Be island has six enclosed lakes. All these island lakes occupy drowned dolines within fengcong karst.
12. Iguazu Falls (Argentina, Brazil)
Iguazu Falls, in Iguazu River, are one of the world's largest waterfalls. They extend over 2,700 m (nearly 2 miles) in a semi-circular shape. Of the 275 falls that collectively make up Iguassu Falls, "Devil's Throat" is the tallest at 80 m in height.
Iguazu Falls are on the border between the Brazilian state of Paraná and the Argentine province of Misiones, and are surrounded by two National Parks (BR/ARG). Both are subtropical rainforests that are host to hundreds of rare and endangered species of flora and fauna.
13. Kilimanjaro (Tanzania)
With its three volcanic cones, Kibo, Mawensi, and Shira, Mount Kilimanjaro is an inactive strato-volcano in north-eastern Tanzania.
It is the tallest free-standing mountain in the world, rising 4,600 m from its base, and includes the highest peak in Africa at 5,895 meters
14. Milford Sound (New Zealand)
Milford Sound, located in the southwest of New Zealand’s South Island, is located within the Fiordland National Park. It runs 15 km inland from the Tasman Sea and is surrounded by sheer rock faces that rise 1200 m or more on either side.
Among its most striking features are Mitre Peak, rising 1,692 m above the sound, the Elephant at 1,517 m and resembling an elephant’s's head, and Lion Mountain, 1,302 m, in the shape of a crouching lion. Lush rain forests cling precariously to these cliffs, while seals, penguins and dolphins populate the water.
15. Puerto Princesa Underground River (Philippines)
The Puerto Princesa Subterranean River National Park is located about 50 km north of the city of Puerto Princesa, Palawan, Philippines. It features a limestone karst mountain landscape with an 8.2 km. navigable underground river. A distinguishing feature of the river is that it winds through a cave before flowing directly into the South China Sea.
It includes major formations of stalactites and stalagmites, and several large chambers. The lower portion of the river is subject to tidal influences. The underground river is reputed to be the world's longest. At the mouth of the cave, a clear lagoon is framed by ancient trees growing right to the water's edge. Monkeys, large monitor lizards, and squirrels find their niche on the beach near the cave.
16. Sundarbans (Bangladesh, India)
The Sundarbans delta, at the mouth of the Ganges river, is the largest mangrove forest in the world, spreading across parts of Bangladesh and West Bengal, India.
The Sundarbans features a complex network of tidal waterways, mudflats and small islands of salt-tolerant mangrove forests.
The area is known for its wide range of fauna, with the Royal Bengal tiger being the most famous, but also including many birds, spotted deer, crocodiles and snakes.
17. Table Mountain (South Africa)
Table Mountain is a flat-topped mountain forming a prominent landmark. It is next to the city of Cape Town in South Africa.
Table Mountain is a important tourist attraction, with many visitors using the cableway to take a ride to the top. The mountain forms part of the Table Mountain National Park.
18. Uluru (Australia)
Uluru (Ayers Rock) is one of Australia's most recognisable natural icons.
The world-renowned sandstone formation stands 348 m high above sea level with most of its bulk below the ground, and measures 9.4 km in circumference. Uluru appears to change color as the different light strikes it at different times of the day and year.
19. Vesuvius (Italy)
Mount Vesuvius is a volcano east of Naples, Italy. It is the only volcano on the European mainland to have erupted within the last hundred years, although it is not currently erupting.
Vesuvius is best known for its eruption in AD 79 that led to the destruction of the Roman cities of Pompeii and Herculaneum. It has erupted many times since and is today regarded as one of the most dangerous volcanoes in the world.
20. Yushan (Chinese Taipei)
Yushan, part of Yushan National Park, is a central mountain range in Chinese Taipei and it also the name of the highest point of the range. It is also called Jade Mountain and its height is 3,952 m above sea level.
The park is also known for its diverse wildlife and ecology. The environment around Yushan itself spans from sub-tropical forests at its base to alpine conditions at its peak.