Helsinki-St. Petersburg train

New, high-speed Allegro trains will begin service between Helsinki, Finland, and St. Petersburg, Russia, on Dec. 12. With a top speed of 140 mph, and combined with faster border procedures, the trains will make the one-way trip in 3½ hours (down from 5½).

A one-way ticket costs €84 (near $114) second class or €134 ($184) first class. Available at travel agencies and train stations in Finland, it cannot be bought online or aboard the train. Visit www.vr.fi/eng.