Quan Su Pagoda
The headquarters of the Buddhist Church of Vietnam, Quan Su Pagoda doesn't boast a long history or impressive architecture, but it is one of Hanoi's famed treasures, built to welcome foreign dignitaries to the capital. Luckily, Quan Su was saved when most of the pagodas were burned down at the end of the Le Dynasty. Buy a stick of incense and make an offering at the assorted altars and sand urns.
Today Quan Su Pagoda is the headquarters for the Vietnam Central Buddhist Congregation and is one of the most important temples in Vietnam. Usually jammed to the rafters with worshippers, its interior space is heavy with incense smoke.