Razavi Khorasan Province, located in northeastern Iran, is rich in cultural and historical landmarks. Here are some popular sites to visit:

1. Imam Reza Shrine: Located in Mashhad, this is the most significant religious site in Iran, attracting millions of pilgrims annually. The complex includes the mausoleum of Imam Reza, the eighth Shia Imam, and features stunning architecture and intricate tile work.

2. Tomb of Ferdowsi: Situated in Tus, this is the burial place of the famous Persian poet Ferdowsi, who authored the epic poem Shahnameh. The tomb is a tribute to his contributions to Persian literature and culture.

3. Nader Shah Afshar's Tomb: Also in Mashhad, this site commemorates Nader Shah, one of Iran's most powerful rulers. The tomb is part of a larger complex that includes a museum showcasing artifacts from his reign.

4. Goharshad Mosque: This mosque is part of the Imam Reza Shrine complex and is renowned for its beautiful architecture and historical significance, dating back to the Timurid era.

5. Kang Village: Known for its picturesque scenery and traditional architecture, Kang is a stepped village located on the slopes of the Binalud Mountains. It offers a glimpse into rural life and stunning views of the surrounding landscape.

6. Torghabeh and Shandiz: These are popular recreational areas near Mashhad, known for their natural beauty, traditional restaurants, and handicrafts.

7. Radkan Tower: An ancient astronomical tower located near Chenaran, believed to have been used for observing the stars and determining the calendar.

These landmarks offer a mix of religious, historical, and natural attractions, making Razavi Khorasan a diverse and fascinating destination for visitors.