Last summer, I was invited by my parents to visit Trang An - Ninh Binh eco-tourism area. This place is as beautiful as an embroidered picture with charming mountain scenery. This relic was discovered a few years ago and quickly became an attractive tourist destination. There are many hydrodynamics here, visitors can both walk on the road and can take a boat on the river. When going into the caves, the feeling of mystery and excitement is wonderful. The entrance of the cave is tiny, but dozens of boats can enter. Inside, sparkling stalactites flow on the cave walls, creating vivid wonders. The caves also have very unique names, such as Tran cave, Cook wine cave, Ba Giot cave ... the largest is Tran cave. They are interconnected and can be up to nearly twenty kilometers long. No one is unimpressed when visiting this place and wants to come back again to mingle with the wonderful natural space.