Danish Arabia expedition (1761–1767)

Proceeding to Suez, Niebuhr visited Mount Sinai, and then in October 1762 the expedition sailed to Jeddah and then journeyed overland to Mocha.

The remaining members of the expedition visited Sanaa, the capital of Yemen, but suffered from the climate and returned to Mocha.

He stayed in Bombay for fourteen months and then returned home by way of Muscat, Bushire, Shiraz, and Persepolis.

He also visited the ruins of Babylon (making many important sketches), Baghdad, Basra (where he reported on the Mandaeans),[3] Mosul, and Aleppo.

After a visit to Cyprus, he made a tour through Palestine, crossed the Taurus Mountains to Bursa, reached Constantinople in February 1767, and finally arrived in Copenhagen the following November.