The Turkish metropolis of Istanbul is the only city in the world that can claim to span two continents. Here are the ways travelers can flit between Europe and Asia.

Some 170,000 vehicles cross the bridge per day, according to Istanbul.com, which says while it is a toll bridge, charges only apply to traffic crossing from the European to the Asian side.

In a few early June days, underlying assumptions about Ukraine and Russia were shaken in three ways. On June 1st Ukraine ...