Yes, there is evidence to suggest that there is a supermassive black hole located at the center of our galaxy, the Milky Way. This object, known as Sagittarius A* (pronounced "Sagittarius A-star"), is estimated to have a mass of about four million times that of our Sun. The intense gravitational pull of Sagittarius A* has been observed to affect the motion of stars and other objects in the galactic center, providing strong evidence for its existence. However, it is important to note that Sagittarius A* is not a wormhole, but rather a black hole, which is a region of space where the gravitational pull is so strong that nothing, including light, can escape it.