Vyros Gorge, Canyon in Outer Mani region, Peloponnese, Greece.

Vyros Gorge is a canyon cutting through the mountains of Outer Mani between a high peak and a coastal bay, with steep limestone walls on either side. The passage features alternating sections of narrow rock corridors and more open areas with varied terrain and geological formations.

The gorge is believed to have carried the ancient Royal Road (Vasiliki Odos) linking Sparta with its port at Kardamyli on the Messenian Gulf. Spartans relied on this route once other nearby ports were lost, and during the Messenian Wars Aristomenes crossed Taygetus by the same road to invade the Eurotas plain. Medieval stone watchtowers, called vigles, were built in caves and on cliffs along it against pirate raids, and were reused during Ottoman rule and World War II.

The name Vyros may come from the riverbed's use as a "royal water route", linked to the ancient Royal Road that ran through the gorge between Sparta and Kardamyli. Medieval residents built stone watchtowers, called vigles, in caves and on cliffs to relay signals against pirate raids; they were reused during Ottoman rule and World War II.

The gorge can be entered from several points along the route, allowing visitors to choose different starting locations based on their hiking experience. Spring and autumn months work well for visiting, as these seasons offer cooler temperatures and stable ground conditions.

The gorge's name may come from its river bed: the Greek word for the stream, Vyros, is linked to the ancient Royal Road (Vassiliki Odos) that ran along it. In medieval times, residents built stone watchtowers called vigles in caves and on cliffs to relay warnings of pirate raids by sight from one post to the next.