Doc Lap Hill was one of the two French Strongholds of the Northern Zone protecting the Hedgehog from the north. 

Him Lam Hills are a group of three hills one next to another located 2-3km to the northeast of Dien Bien Phu City center (or The French Commander Post during the Dien Bien Phu Battle). During the Dien Bien Phu Battle Him Lam (or Beatrice) was the most-fortified and strongest French post in Dien Bien Phu which protected the Hedgehog from the northeast.

The French started attacking Vietnam in 1857 and managed to invade Sai Gon, southern Vietnam in 1858. From 1858 to 1865, the French marched northward and gradually invaded all of Vietnam. Along with its neighbors Laos and Cambodia, Vietnam was put into a French colony called Indochina.

C1 Hill (Eliane 1) belonged to the Eliane Group protecting the French Hedgehog at Dien Bien Phu from the east. Eliane 1 was located 1.2km slightly to the northeast of the French Commander Post.

C2 Hill (Eliane 4) belonged to the Eliane Group protecting the French Hedgehog at Dien Bien Phu from the east. Eliane 4 was located 1.1km to the east of the French Commander Post.

D1 Hill (Dominique 2) belonged to the Dominique Group protecting the French Hedgehog at Dien Bien Phu from the northeast. Dominique 2 was the highest of the hills protecting the eastern flank of the French Hedehog at Dien Bien Phu.

E1 Hill (Dominique 1) belonged to the Dominique Group protecting the French Hedgehog at Dien Bien Phu from the northeast. 

The Tham Pua Cave is at the base of the Pu Hong Cay Mountain on the edge of the Ban Bo Village, Chieng Dong Commune (before 2013 it was Chieng Sinh), Tuan Giao District, Dien Bien Province. 

The Battle of Dien Bien Phu helped the Vietnamese to gain independence to half of the country. The Battle of Dien Bien Phu was an inspiration to other countries which had been under control of colonialism that they could fight off colonialism to gain back independence to their own country and people.

Dien Bien Province is located in the North-West of Vietnam. Dien Bien shares border with China to the north-west, with Lai Chau to the north and north-east, with Son La to the east and south-east and south, with Laos to the south-west and west. Dien Bien has an international border-crossing with Laos at Tay Trang (Vietnam) – Sop Hun (Laos).

Dien Bien Phu is the capital city of Dien Bien Province in the Northwest of Vietnam. Dien Bien Phu was the combat site of the Dien Bien Phu Battle which helped to change the course of the World History in the 20th century.

Muong Phang is a valley 30km from Dien Bien Phu City via route 279 (Route 41 during the Dien Bien Phu Battle), 20km via the mountain path and 10km as the crow flies.

The Muong Thanh Valley is the biggest valley in the Northwest of Vietnam on an averaged elevation of 400m above sea level. The valley runs for 20km from the north to the south. And the width of the valley is about 6-8km. 

The North-West of Vietnam is characterized by high mountains and colorful ethnic minorities. The North-West of Vietnam includes the provinces of Hoa Binh, Son La, Lai Chau, Dien Bien, Ha Giang, Lao Cai, Yen Bai.

Pha Din is a 32-km mountain pass connecting Son La and Dien Bien via Route 6. “Pha Din” in local Thai Language means “Heaven and Earth”. The highest point on the pass is over 1,600m above sea level. The pass is one of the four most sublime mountain passes in northern Vietnam. The other three are O Quy Ho (between Lai Chau and Lao Cai), Ma Pi Leng (Ha Giang), Khau Pha (Yen Bai).