Located in the heart of Phong Nha-Ke Bang National Park in Vietnam, Son Doong is widely recognized as the largest cave in the world. It is a true natural wonder that houses its own localized ecosystem, including a lush jungle known as the "Garden of Edam" and a fast-flowing underground river. What makes the cave particularly breathtaking are the colossal stalagmites and the "dolines"—enormous collapsed ceilings that allow sunlight to stream in, creating ethereal beams of light. Exploring this majestic site feels like stepping into another world or a prehistoric film set. Its sheer scale and untouched beauty make it a bucket-list destination for adventurers and nature lovers globally.

1.The tour guide showed us the temple which was over 300 years old yesterday.

2.Ha Long Bay is a natural wonder where limestone islands create a breathtaking view.

1.The travel plan which I made last night still needs a few changes.

2.The photographer who captured beautiful photos showed us the best spots to go sightseeing.

3.Claire asked him if he was exploring Son Doong Cave with them the following week.