What city was built with two human sacrifices?

You may be referring to Jericho, as in 1 Kings 16:34. If so, you've made two mistakes. Firstly, no literal human sacrifice was perpetrated. Rather, the transgressor (Hiel) lost his sons as they died of "natural" causes (Rashi commentary), in punishment for his stubbornness in continuing to transgress (he rebuilt Jericho despite Joshua's imprecation). See also Joshua 6:26, which clearly predicts the event, centuries before Hiel's lifetime.The second mistake is that more than two of his sons died, even though only two are named explicitly.

The Hebrew name of Jericho comes from the Word for smell, because of the abundant fragrant plant-species in the area (Rashi commentary, Talmud Berakhot 43a, quoting the ancient Josephus).