Red-and-white decorations, ancient rituals, and unique traditions: The surprising reason that makes Bulgaria a perfect spring destination—plus, where to celebrate Baba Marta in Israel.

Irish low-cost carrier Ryanair said on Wednesday that it will invest $1 billion (916.4 million euro) in Bulgaria if the country lowers airport access costs.

Known for golden sands, rich history and verdant forests, Bulgaria’s Black Sea Coast ... town of Sozopol to the expansive beaches of Burgas and Rila National Park, there’s something along ...