HCMC is a real big city. Developing at impressive speed, the number of taxis must run in the thousands and the number of motorcycles in the millions. High-rises are advancing, but there are still some cultural gems to be found. May is not the best month to be there, it is extremely hot and humid, with the wet season just starting. If you have time to mix pleasure with business, there are some nice trips to be made from HCMC: the famous Cu Chi tunnels made by the Vietcong between 1948 and 1975 or the beautiful delta-area with mangrove forests and the beaches on the coast.