Much like salmon returning to their home stream, sea turtles also prefer to return to nest on the same beach where they were born.
Given the vast distances they travel, their ability to locate their home beach is remarkable. As with many migratory animals, sea turtles accomplish this feat by measuring the Earth's magnetic field.
However, their ability cannot account for deflection from ocean currents, and some turtles wander aimlessly for long periods of time at sea when currents are strong. Maybe this handicap explains why they live such long lives!