Voronezh Oblast is in Russia's Don-Voronezh Region, which borders Ukraine to the southwest, Belgorod Oblast to the west, Kursk Oblast to the northwest, Lipetsk Oblast to the north, Tambov Oblast to the northeast, Ulyanovsk Oblast to the northeast, Volgograd Oblast to the east, and Rostov Oblast to the south.
Voronezh is considered the heart of the "Black Earth Region," a rich soiled region in the south of Central Russia. In its post-Soviet history it has also come to be known as the heart of Russia's "Red Belt," the center of contemporary Russian communism, owing to its high unemployment levels. An interesting read for visitors is Black Earth City, an account written by Charlotte Hobson, a foreign student visiting the capital in 1991–92.
Chances are high that you will need either some knowledge of Russian or a competent guide in order to travel outside of Voronezh.
Voronezh Airport is served by flights from Moscow, Saint Petersburg, Munich, Prague, and Yerevan. Voronezh, being the major rail hub between Central and Southern Russia, is also easily accessible by train from Kiev, Moscow, Rostov-on-the-Don and other major cities in these regions.