The Iguazu River is a significant waterway in South America. The Iguazu River flows through Brazil and Argentina. It forms part of the boundary between the two countries. The river is approximately 1,320 kilometers (820 miles) long. It originates near the city of Curitiba in the Brazilian state of Paraná and flows westward, eventually joining the Paraná River.

Lake Ontario is one of the five Great Lakes of North America and the easternmost of the group. Lake Ontario is bordered by the province of Ontario in Canada to the north, west, and southwest, and the state of New York in the United States to the south and east. It is the smallest of the Great Lakes by surface area but has significant depth.

The Hindu Kush is a significant mountain range in Central and South Asia, extending approximately 800 kilometers (500 miles) through Afghanistan and into northern Pakistan. Tirich Mir in Pakistan, which stands at 7,708 meters (25,289 feet), is the highest peak of the range. The range features rugged terrain with deep valleys and high, snow-covered peaks, making it a formidable barrier.

Lake Superior is the largest freshwater lake in the world by surface area. It is the world's third-largest freshwater lake by volume and contains nearly 10% of the word’s fresh surface water. Lake Superior is relatively young, approximately 10,000 years old dating back to the last glacial retreat. The Lake Superior watershed includes the surrounding areas of Ontario, Minnesota, Wisconsin and Michigan.

Victoria Falls is one of the most famous and spectacular waterfalls in the world. Located on the border between Zambia and Zimbabwe in Southern Africa. The falls were formed over millions of years by the geological activity that created the East African Rift System. The Zambezi River plunges into a series of gorges, creating the dramatic falls.

Niagara Falls is one of the most famous natural attractions in North America, known for its stunning beauty and immense power. Niagara Falls straddles the border between the United States and Canada, with two main sections: - Horseshoe Falls: The larger and more impressive of the two, located on the Canadian side. - American Falls: Located on the U.S. side, along with the smaller Bridal Veil Falls.

The Arabian Desert is a vast desert region that spans much of the Arabian Peninsula. The Arabian Desert covers parts of Saudi Arabia, Oman, Jordan, Iraq, Qatar, the United Arab Emirates, Kuwait, and Yemen. The desert features diverse landscapes, including vast sand dunes, gravel plains, rocky plateaus, and occasional mountain ranges.

The Strait of Malacca is a critical and strategic maritime passage that lies between the Malay Peninsula (Peninsular Malaysia) and the Indonesian island of Sumatra. The strait extends approximately 890 kilometers (550 miles) from the Andaman Sea to the South China Sea, narrowing down to about 2.8 kilometers (1.7 miles) at its narrowest point near Singapore.

The Sahara Desert is the world's largest hot desert, spanning across North Africa. It covers approximately 9.2 million square kilometers, making it the third-largest desert globally, smaller only than Antarctica and the Arctic. The desert extends from the Red Sea in the east to the Atlantic Ocean in the west, and from the Mediterranean in the north to the Sahel savanna in the south.

The Red Sea is a seawater inlet of the Indian Ocean, lying between Africa and Asia. It is one of the most significant bodies of water in the world due to its strategic location and rich biodiversity. The Red Sea is a popular destination for tourists, especially for diving and snorkeling, due to its clear waters and rich underwater ecosystems.