I don't think "inhospitable" is a right word. These places have harsh conditions but still are very interesting to explore. I recommend people trying Mui Ne Sand Desert in Phan Thiet.

"Vietnam may strike an impression of a serene country. Nonetheless, when you travel to Vietnam, you will be surprised to know that there are many areas in Vietnam that will not give tourists any warm welcome. However, their harshness of environment is the thing that attracts travelers from all walks of life to come and explore.

Quang Tri fire land: used to suffer severe bombing in the past time. Although being carefully rebuilt and developed, when coming to Quang Tri, we still see the imprints of war that seem to can never be erased. Besides the remnants of war, there are many other landscapes for tourists to explore and take photos such as: Hien Luong bridge, My Thuy beach, Cua Viet beach, Brai cave etc.

U Minh forest, including U Minh Thuong and U Minh Ha, which is most famous for its diversity of wild animals, such as: poisonous snakes, bees, mosquitoes, crocodiles ... that horrifies visitors if they come across by accident. However, if you have carefully prepared yourself and ignored the initial worry, you will have the opportunity to discover and find out about one of the most mangrove forests in Vietnam and the world.

Mui Ne sand desert: The desertification occurs in the arid coastline along the central coast from Quang Binh to Binh Thuan. What most notable about Mui Ne are the sand desert with enormous dunes of sand, which highly affect people's lives. The activities you should try here is sliding on the sand, running on motorcycles, etc...

Truong Sa & Hoang Sa archipelago: The two islands have the most extreme climate conditions in all regions of our country. Here, fresh water is extremely scarce and the land is not appropriate for cultivation. Not only so, it also regularly buckles storms and hurricanes before they go to mainland. However, these islands are very attractive destinations to those love exploring and conquering new places. Moreover, Truong Sa & Hoang Sa are the pride of Vietnamese people.

Winter in Mau Son: Mau Son is a famous sight located between Loc Binh and Cao Loc, Lang Son province. The place is believed to have the coldest climate in Vietnam. In winter, in some areas of Mau Son, the temperature falls down to below zero, which results in snow, frozen trees and almost everywhere is covered with thick snow.Vietnamese Language Studies hopes this information is helpful for your eager to explore this Asian country while studying Vietnamese in HCMC."

Source: http://vlstudies.com/vn/news--events...-vietnam/798/1