*Thien Mu Pagoda - the central tower is pretty much the symbol of Hue. It was also the home of the monk Thich Quang Duc, who, in 1963, drove his Austin to Saigon, got out, and set himself alight to protest the Diem government’s treatment of Buddhists.
*Minh Mang Tomb - the expansive grounds and lake are beautifully serene, and you just want to sit and ponder.
*Check out the light show on the bridge after dark.
*Get out on the Perfume River to see the local women fishing, and marvel at the boats, moving rock, etc., and how close they sit to the water.
*To me, someone said to the citizens of Hue, "go forth and make money." You see three bicycle shops in a row selling exactly the same bike for the same price, 50 identical dragon boats offering the identical all day boat trip for Au, including lunch, all going out less than half full, or, my personal favorite, buying your entry ticket to a tomb from one guy to walk 2 feet to hand it to another guy who carefully cuts the corner off.
Quick Tips:
If tombs, pagodas, and temples aren't your thing, then you may as well give Hue a miss. If you just want the whistle-stop tour, the ubiquitous boat trip will take you to five of the most popular. Admission is extra, about 55,000 dong at each site. At least one stop will involve you having to hire a moto driver to take you about 5km, and don't be surprised when they double the price on the return trip!
If you have a real interest in the sites of Hue and want to spend more than about 30 minutes per site, then hire a car and driver to take you out. Any and every hotel can organise this for you.
Best Way To Get Around:
We flew from Ho Chi Minh into Hue. It cost about Au. Traffic isn't a problem in Hue, so walking around is easy and safe. Push bikes are readily available for hire, as are taxis, cyclos, and moto taxis for those willing to risk life and limb in a third-world country.