In 2005, law professor Brian C. Kalt discovered a bizarre legal anomaly created by the intersection of the Sixth Amendment and federal jurisdiction. Yellowstone National Park covers land across Wyoming, Montana, and Idaho.
Congress placed the entire park under the jurisdiction of the U. S. District Court for the District of Wyoming, making it the only federal judicial district that spans multiple states.
However, the Sixth Amendment's Vicinage Clause guarantees a criminal defendant the right to a trial by a jury composed of residents from both the state and the judicial district where the crime was committed. In the Idaho portion of Yellowstone, an area spanning roughly 50 square miles, the state is Idaho but the federal district is Wyoming. Because the population of this specific overlapping area is exactly zero, it is impossible to impanel a constitutional jury of local residents.
In theory, a perpetrator could commit a felony in this 'Zone of Death' and walk free because a lawful jury cannot be formed. Despite warnings from legal scholars, Congress has yet to pass simple legislation closing the loophole.