Food!
Russian cuisine has a lot to offer, but there are a lot of unusual names to be aware of. If you want to get the most out of your culinary adventures, do some homework ahead of time on the various foods available during each season so you aren't stuck eating borscht (beetroot soup) every day.
Russian cuisine is a collection of Russian recipes and cooking traditions, as well as a list of popular culinary goods in Russia, with most names dating back to pre-Soviet times and hailing from various social groups.
Restaurants in central locations will almost definitely have English-speaking staff to assist you, but if you're looking for a unique experience, it's best to be prepared, especially to prevent accidentally ordering something like beef gelatine. Even that, however, is an acquired taste.