Charax (Ancient Greek: Χάραξ, gen.: Χάρακος) is the largest Roman military settlement excavated in the Crimea.

[1] It was sited on a four-hectare area at the western ridge of Ai-Todor, close to the modern tourist attraction of Swallow's Nest.

In 1896, excavations were resumed under the supervision of Grand Duke Alexander Mikhailovich of Russia, who had his summer dacha constructed in the immediate vicitinity of the ruins and the 1865 lighthouse.

Michael Rostovtzeff, who oversaw the excavations on behalf of the St. Petersburg University, classed Charax as an "entire Roman city", rather than just a fort, as was previously thought.

Further exploration of the site, undertaken by Vladimir Blavatsky in 1931-35, revealed remains of two public water basins, thermae, and an aqueduct.