Which country is the most visited in the world, welcoming over 90 million international tourists annually? This European nation has been the top tourist destination for over 30 years. Its appeal includes the Eiffel Tower, the Louvre Museum (home of the Mona Lisa), the Palace of Versailles, the French Riviera, over 400 cheese varieties, and world-famous wines. The country has 45 UNESCO World Heritage sites, including Mont-Saint-Michel, the Palace of Versailles, and the prehistoric caves of Lascaux. Paris alone receives 30 million visitors per year. The country's tourism industry employs over 2 million people and accounts for nearly 8% of its GDP. In 2019 (pre-pandemic), it broke its own record with 90 million arrivals.

In which South American country would you find the ancient Incan citadel of Machu Picchu? This UNESCO World Heritage site sits at 2,430 meters (7,970 feet) above sea level in the Andes Mountains. It was built around 1450 AD but was abandoned just 100 years later during the Spanish conquest. The site remained unknown to the outside world until American historian Hiram Bingham was led there by local farmers in 1911. The citadel contains over 150 buildings, including temples, sanctuaries, and baths, all built with precisely cut stones that fit together without mortar. The name means "Old Mountain" in the Quechua language. In 2007, it was named one of the New Seven Wonders of the World.

In which Middle Eastern country would you find the ancient rock-cut city of Petra, famous for its Treasury building carved into pink sandstone? This archaeological wonder was the capital of the Nabatean Kingdom from around 400 BC to 106 AD. The city is accessed through a 1.2-kilometer (0.75-mile) narrow gorge called the Siq, which ends at the famous Treasury (Al-Khazneh). In reality, the Treasury was not a treasury but a tomb or temple – Bedouins believed pirates hid treasure in the urn carved at its top. Only 15% of the city has been excavated; the rest remains underground. Petra was named one of the New Seven Wonders of the World in 2007 and was featured in the movie "Indiana Jones and the Last Crusade."

Which tourist attraction is the most visited in the world, attracting over 75 million people annually? This massive open-air market district in Bangkok, Thailand covers 35 acres and contains over 15,000 stalls. It is not a single attraction but a sprawling complex divided into 27 sections, each specializing in different goods – antiques, clothing, jewelry, art, furniture, books, plants, and even pets. Approximately 200,000 people visit each day on weekends. The name comes from the Thai words "chat" (pronounced "jàt") meaning "to be born" and "chak" meaning "to be reborn" – symbolizing the cycle of reincarnation. It is famous for its street food, which has been recognized by Michelin with Bib Gourmand awards.

Which country is home to the Great Barrier Reef, the world's largest coral reef system? This natural wonder stretches for 2,300 kilometers (1,430 miles) along the northeast coast of the country. It contains over 2,900 individual reefs, 900 islands, and covers 344,000 square kilometers (133,000 square miles) – larger than the United Kingdom, Switzerland, and the Netherlands combined. The reef is so massive that it is visible from space. It is home to 1,500 species of fish, 400 species of coral, 4,000 species of mollusk, and 240 species of birds. The reef is the world's largest living structure built by billions of tiny organisms called coral polyps. It was named a UNESCO World Heritage site in 1981 and is one of the Seven Natural Wonders of the World.

Which European city is often called the most photographed city in the world, with iconic landmarks like St. Mark's Square, the Grand Canal, and the Rialto Bridge? This city is built on 118 small islands separated by canals and linked by 400 bridges. There are no cars – transportation is by boat or on foot. The city is sinking and flooding more frequently due to rising sea levels and land subsidence, a phenomenon called "acqua alta." It has been sinking at a rate of 1-2 millimeters per year for centuries. The city was a major maritime republic during the Middle Ages and Renaissance and is famous for Carnival masks, Murano glass, and gondola rides. Its name comes from the ancient Veneti people who settled the region. The city is at serious risk of being lost to the sea within the next century.

Vinicunca, also known as "Rainbow Mountain" or "Mountain of Seven Colors," is a popular trekking destination in which country? This mountain, at 5,200 meters (17,100 feet) elevation, has distinct stripes of red, yellow, green, blue, and purple. The colors come from different mineral deposits – red from iron oxide, yellow from iron sulfide (pyrite), green from chlorite, and blue from glauconite. For centuries, the mountain was hidden under a glacier. As climate change caused the ice to melt, the colorful layers were exposed for the first time in thousands of years. The mountain only became a tourist attraction in 2016. The high altitude makes the trek challenging – many visitors require coca leaves or oxygen to complete it.

Which Egyptian city is known as the "City of a Thousand Minarets" and is home to the Al-Azhar University (founded in 970 AD), one of the world's oldest universities? This city of over 20 million people is located on the Nile River. It was founded in 969 AD by the Fatimid Caliphate and became a major center of Islamic learning. The city contains over 1,000 mosques, including the famous Al-Hussein Mosque and the Mosque-Madrassa of Sultan Hassan. The historic district, known as Islamic Cairo, is a UNESCO World Heritage site with narrow streets, medieval architecture, and bustling bazaars like Khan el-Khalili. The city is the Arab world's largest city and Africa's second-largest. However, it is NOT the capital of Egypt (that is a different, older city nearby).

On which US island would you find the famous scenic drive called the "Road to Hana," with over 600 curves and 54 one-lane bridges? This 103-kilometer (64-mile) highway winds through rainforests, past waterfalls, and along dramatic ocean cliffs on the eastern side of the island. The drive takes 2.5 to 4 hours one-way due to the narrow, winding road. There are over 600 curves, 54 one-lane bridges (many from the early 1900s), and countless waterfalls visible from the road. The town of Hana at the end is a small, isolated community that maintains traditional Hawaiian culture. The area receives up to 300 inches of rain annually, creating lush vegetation. The drive is considered one of the most beautiful – and most challenging – scenic routes in the world.

Which Central Asian country is home to the "Door to Hell" (Darvaza Gas Crater), a natural gas field that has been burning continuously since 1971? This large crater, 70 meters (230 feet) wide and 30 meters (98 feet) deep, was created when Soviet geologists were drilling for natural gas. The ground collapsed into a cavern, releasing methane gas. Fearing the gas would harm nearby villages, the geologists set it on fire, expecting it to burn out in a few weeks. It has been burning for over 50 years. The crater is located in the middle of the Karakum Desert. Despite the intense heat nearby, the site has become a popular tourist attraction, especially at night when the glow can be seen for miles. In 2018, the president ordered scientists to find a way to extinguish the fire.