While it can be a temptation to just kick back and relax when holidaying in Sumba, keep in mind that the surrounding region's treasure-trove of natural sights, cities and towns are never more than a day trip away. Nihiwatu and Tambolaka are just two of the many other places worth seeing while you're in Nusa Tenggara.
A really good way to really get a sense of a place and its people is by gaining an understanding of its history. While here, be sure to visit the area's historic traditional villages. For a look into the religious side of Sumba, be sure to head to the region's many temples.
When the weather is right, make like a local and head to the area's gorgeous waterways for a day of swimming or sea kayaking.
The 17th of August is the date when many people in Indonesia observe Independence Day, so keep an eye out for festivities and parades if you happen to be visiting Sumba then.
Keep in mind, adventures are the only thing you can buy that increases your wealth. Your time in this city will provide memories you'll forever treasure.