Nha Trang coast - we spent our afternoon at the beach in the warm water. The beach didn't have the white sand and blue water I'd heard about, but it was still fun swimming in the ocean.
After the beach, we took a taxi to the Thap Ba Hot Springs and Mud Baths in the mountains of NT. Entrance was about $5.75/person. We were very impressed with how organized and clean the facilities were and spent about 3 hours there, incl 1 hr massages for about $7. Here Dan and Jenn were freaked out in the mudbath since we had to share with some men who were a little too excited to show us how to pour the mud on our bodies and rub the mud into our skin... we def caused a scene.
For Ha- I have no idea what this biz is