Odessa is the fourth largest city in Ukraine. Odessa is a major port on the Black Sea.             Attractions

Odessa is a popular tourist destination, with many therapeutic resorts in and around the city. The Filatov Institute of Eye Diseases & Tissue Therapy is one of the leading institutes for eye care.
The Tolstoy, Vorontsov, and Potocki families owned palaces in Odessa, which can still be visited.
Most of the city's 19th century houses were built of limestone mined nearby. Abandoned mines were later used and broadened by local smugglers. This created a complicated labyrinth of underground tunnels beneath Odessa, known as "catacombs". They are a now a great attraction for extreme tourists. Such tours, however, are not officially sanctioned and are dangerous because the layout of the catacombs has not been fully mapped and the tunnels themselves are unsafe. These tunnels are a primary reason why a subway system was never built in Odessa.