Nha Trang is Vietnam’s most famous seaside resort-town. It's more lively and urban in character than other beach destinations like Mui Ne and Phu Quoc. It's also the scuba diving center of Vietnam.

Transportation
By plane: Cam Ranh Airport (CRX), built on the grounds of an old American airbase in 2004, is located 30km from the city and serves only domestic destinations. Taxi fare from the airport to downtown locations should be about 170,000 dong, though many hotels have their own buses.
By train: Nha Trang is a stop on the main railway-line connecting Hanoi and Ho Chi Minh City (Saigon). The railway station is close to the cathedral in the northern part of town. If you want a soft-sleeper (the highest class available on Vietnamese trains), book your train ticket directly at the train station as far in advance as you are able. Having a private travel agent book this ticket will quite often result in you paying the agent for a soft-sleeper - the agent will book a hard-sleeper and you will not know until you board the train and it is too late to make changes. This is one of the most common scams in Vietnam!
By bus: Most open tour buses arrive from Ho Chi Minh City in the south (8 hours) and Hoi An to the north (10 hours). They drop their passengers in the main tourist area around Bien Thu, while the public bus station is at 58, 23 Thang 10, about a 10 minute walk west of the center.
By car: Private car rental with a driver are usually modern air-con cars and can be rented from US$45-75/day.
Car rental prices (as mostly anything in Vietnam) usually increase during holiday seasons especially around Tet (Vietnamese’s New Year). Make sure to avoid high prices by booking it beforehand with the car rental services.
Tourist attraction
Most people like the locals or tourists come to Nha Trang for the beach. That would be their main motive. The beach here is unbelievably breathtaking. The water is so clear that you can literally distinguish everything you see under sea. The sand is white, the wind is peaceful, the air is fresh, and the people are friendly. Most importantly, everything the place has to offer is great and inexpensive. Whether you come for fresh air from the ocean, or to get a nice tan, or just to relax with your family, the beach at Nha Trang has it all. What is also different here is that you will likely see many women vendors walking along the beach selling steamed seafood. They will carry different types of seafood (some are unique to Vietnam and very expensive), and food is always kept hot and fresh. If you ever have the chance to come here, one of the things you must try is this as it is very tasty.
The sites below can be toured in one day. It is always better to tour with other people.
National Oceanographic Museum of Vietnam, 01 Cau Da, 058-590-037. Admission US$1. Open 7am-4pm. This is like an aquarium with popular and rare species of the sea. A perfect place to bring kids as they will get to see sharks, turtles, coral reefs, lionfish, sea horses, and many other creatures.
Alexandre Yersin Museum, 10 Tran Phu St., 058-822-355. Admission US$2. Mon-Sat 8-11am and 2-4:30pm. This is a scientific museum of a Swiss-born, Dr. Alexandre Yersin (1863-1943), who arrived in Vietnam in 1891 to study infected animals. He then later on produced a serum from horses and buffaloes. In this museum, you will be able to view all of his work as well as his equipment. Yersin never went back to Switzerland as he spent the rest of his life in Nha Trang. Don’t try to take pictures. Do respect the rules since they're quite serious here.
Long Son Pagoda, Thai Nguyen St. Free admission. Open 8am-5pm. At this pagoda, you will see a 79 ft. tall white Buddha. The pagoda was established in 1963 to honor the monks and nuns who died demonstrating against the Diem government.
Po Ngar Cham Towers, 2 Thang 4 St. Admission US$0.8. Open daily 7:30am-5pm. This tower was built by the Cham people to honor Yang Ino Po Ngar, mother of the kingdom. The local Buddhists of Nha Trang occupied this place for prayers and worshipping, and there are many incense lighted giving the place an interesting aroma. The Po Ngar Kalan is a very glorified structure with amazing architectures filled with stunning colors.