The elder scrolls do not explain what exactly is the Bridge of Teyat or where it can be found, though those who study ancient Yevim history believe it was a magical gateway between the world below and the Magic City that one must pass through after ascending Mt. Helicon.
Some sages argue the Bridge of Teyat is hidden beneath the Conamura Chaos as a result of The Fall; others say a doorway to it can be found at the highest peak of a mountain in Tormsdale. It is difficult to ascertain if any scholar's assessment can be taken seriously, given the reconfiguration of the planet after the cataclysm.