Arethusa Brook is a small stream located in the White Mountains of New Hampshire. It flows through the scenic landscape, contributing to the area's natural beauty and ecosystem. The brook is named after Arethusa, a figure from Greek mythology, known for her connection to water. The brook is a popular spot for hikers and nature enthusiasts, as it offers picturesque views and opportunities for wildlife observation. It is part of the larger Pemigewasset River watershed, which plays a crucial role in the region's hydrology and supports various plant and animal species.