Dive into Hanoi's pulsating city streets, and you'll capture the essence of Vietnamese life. The country's capital is a burgeoning economic center that still clings strongly to traditional culture, managing to be a showcase of both old and modern Vietnam. Sapa is a small, mountain town in Lao Cai Province. This quiet Vietnamese town is home to different ethnic tribal groups. There are five main ethnic groups in Sapa. Halong Bay is a very diverse natural landscape, varying from long sandy beach to thousand-year-old-lime karst. Halong Bay covers nearly 1900 islets of different size, some very large such as Thien Cung Cave or Surprise Cave, others as small as a few meters wide.