What is the largest cave in the world?

Son Doong Cave, located in the Phong Nha-Ke Bang National Park in Vietnam, is considered the largest cave in the world by volume and cross-section. It was discovered in 1991 by a local farmer, but wasn't explored by a team of British cavers until 2009. Since then, Son Doong Cave has been recognized as one of the world's most spectacular natural wonders.

The cave measures over 5.5 miles (9 kilometers) in length, with sections reaching heights of up to 650 feet (200 meters) and widths of up to 500 feet (150 meters). It contains its own ecosystem, complete with rivers, waterfalls, and a variety of plant and animal life.

Visitors can explore Son Doong Cave on guided tours, which typically last around 4-5 days and involve trekking through the jungle, rappelling down cliffs, and crossing underground rivers. Due to its remote location and the fragile ecosystem within the cave, access to Son Doong is strictly limited and tours must be booked in advance.

The largest cave in the world is Son Doong, which is located in Vietnam. It was discovered in 1990, but was not fully explored until 2009. Son Doong is 5.5 miles (9 km) long and has a volume of 38.5 million cubic meters (1.35 billion cubic feet). It is so large that it can house a 40-story skyscraper. Son Doong is also home to a variety of plant and animal life, including bats, birds, and insects.

Here are some other interesting facts about Son Doong:

• The cave is so large that it has its own weather system.
• The cave is home to a variety of plant and animal life, including bats, birds, and insects.
• Son Doong is a popular tourist destination, and tours are available through Oxalis Adventure.
• The cave is located in the Phong Nha-Ke Bang National Park, which is a UNESCO World Heritage Site.