Eastern Visayas encompasses the two large islands of Leyte and Samar, the province of Biliran and several minor islands. This region is the eastern boundary of the Philippines. The San Bernardino Strait separates Eastern Visayas from Luzon in the southeast while the Surigao Strait separates the province of Leyte from the northeastern part of Mindanao. The Visayan and Camotes Seas separate the region from the rest of the Visayas. On the east, the region faces the Pacific Ocean. The San Juanico Strait separates the islands of Samar and Leyte. The terrain of the two large islands is entirely different. Leyte has a high peaked mountain mass in the interior while Samar has low rugged hills interspersed with valleys