In Razavi Khorasan, you can find the mausoleums of several prominent historical figures:
Ferdowsi: The mausoleum of the renowned Persian poet Ferdowsi is located in Tus, within Razavi Khorasan province. Ferdowsi is celebrated for his epic work, the Shahnameh, which chronicles the history and mythology of Persia (source).
Imam Reza: The Imam Reza Holy Shrine is one of the most significant religious sites in Iran, located in the city of Mashhad. It is the mausoleum of Imam Reza, the eighth Imam of the Shi'a Muslims (source).
Khajeh Rabi': Situated in Mashhad, the Khajeh Rabi' Mausoleum is reputedly the tomb of an early Islamic era figure and was constructed under the direction of Shah Abbas I (source).
These mausoleums are significant not only for their historical and cultural value but also for their architectural beauty, attracting visitors from around the world.