The Bounty Hunters
Gates enable instantaneous travel between far away places. Gates come in pairs; each one connects to its twin. They are constructed out of a rare wood in the shape of a tunnel about ten feet long. Each tunnel has an entrance end which leads to the exit end of its twin.
If you stand near the exit of a gate, you may catch a whiff of the locale it connects to.
A city’s gates are typically concentrated in its marketplace, lined up side by side in several rows.