Kraison Siharat Palace (Yen Palace)

Also called Yen Palace, this Khmer-influenced royal residence in Lopburi Old Town dates to King Narai's era. The ruins sit in a quieter section of the palace grounds, partially shaded by old trees. Stone window frames and doorways still stand, giving you a sense of the original layout. Fewer visitors make it here compared to the main Narai Ratchaniwet complex, so you can explore without crowds. Free entry with the palace compound ticket.