The Dos de Mayo Square, known as the Óvalo de la Reina until 1866, is a public square located in Lima, Peru. Located on the southwestern edge of the historic centre's bufferzone, it serves as the junction of several important avenues, including Alfonso Ugarte, La Colmena and Colonial avenues. In the late 20th century, a vehicular tunnel was built under the square to curb traffic congestions.