Khor Rori (Arabic: خور روري, romanized: Khawr Rawrī) is a bar-built estuary at the mouth of Wādī Darbāt in the Dhofar Governorate, Oman, near Taqah.

[3] Khor Rori is best known for the ruins of the ancient fortified port city of Sumhuram on the eastern bank, which was founded in the 3rd century BC as an outpost for the Kingdom of Ḥaḍramawt.

The Dhofar region was the main source of frankincense in the ancient period, and it seems likely that the foundation of the settlement by the Hadhramaut was in part motivated by wish to control the production of this valuable commodity.

It has also been identified with Abissa polis or Abyssapolis (Ancient Greek: Ἄβισσα πόλις) from Ptolemy; this name has first been connected with the abyss besides the waterfall of Wādī Darbāt,[9][14][15] but may be related to the Abyssinian people.

In the 1890s the location was pointed out by Eduard Glaser, and English explorer James Theodore Bent, who visited it in January 1895 with his wife Mabel, published a description of it, and reiterated the double identification.

In tourism literature, Sumhuram is occasionally promoted as the summer palace of the Queen of Sheba,[18] the legendary ruler of the Sabaʾ Kingdom living in the 10th century BC.