The Hyollung Royal Tomb, west of Kaesong, holds the remains of Wang Kon (T'aejo) — the founder of the Koryo dynasty in 918 and the king who unified the Korean peninsula. The site is one of the grandest royal tombs on the peninsula, though most of what you see was reconstructed in the 1990s on a much larger scale than the original.
A long stone-flagged path lined with carved stone tigers, sheep, horses, and warriors leads up to the twin burial mounds for Wang Kon and his wife. The setting against a backdrop of low hills is genuinely impressive, and the historical weight of the place — Korea's founding king, the man whose name became a country — gives it a presence that survives the reconstruction. Tours combine it with the Tomb of King Kongmin nearby.