Why should you go there and how do you do it right?

The real reason to visit is the Mekong itself. Instead of the usual imported reef fish, the tanks house species from the river system that flows past Nong Khai. This makes the visit feel completely authentic. The walk-through tunnel is a particularly unforgettable experience for children: fish swim overhead and at eye level while they stand below.

It's a rather unassuming place, not really suitable for a day trip. I'd recommend setting aside a few hours rather than half a day. Families with young children will get the most out of it, as will anyone who's ever gazed at the Mekong from a promenade and wondered what actually lives in all that brown water. The exhibits are educational, so it's also ideal for a hot afternoon if you're looking for shelter and something to keep the kids occupied. If you're not interested in fish, you should skip it and spend the time on the riverbank instead.