Is this a reference to something?
No. It's a traditional kind of bridge that is made of just bamboo bars like this:
That particular one wouldn't be on an island in the Mekong near Ben Tre?
"Cầu khỉ" nó là một trong những cây cầu phải can đảm hoặc đi quen mới có thể vượt qua nó.
~ The "monkey bridge" mostly in South Vietnam, it is one of the bridges that must be courageous or familiar to be able to cross it.
OMG Cầu khỉ