Yaroslavl Oblast is full of rather magnificent destinations for onion dome loving travelers on the Golden Ring circuit. The region has benefited from trade throughout Russia's history as it lies on the Volga River and is relatively close to both Moscow and Saint Petersburg. Under Stalin's rule, a massive dam was built at Rybinsk, creating the Rybinsk Reservoir, which is about the size of Brunei, and which flooded some of the region's most important religious sites, especially at the town of Mologda, where 300 residents refused to leave and drowned.
English and possibly other languages are often spoken at major tourist sites, but in the rest of the regions, Russian may be the only language that you encounter.
Trains arrive from both Saint Petersburg and Moscow (~4 hours) to Yaroslavl, and from Moscow to Rostov Veliky (3 hours).