Thairon's Storybook of Conveyance

You touch an artistic depiction of a real location and transform it into a one-way portal. For the duration, creatures can enter the depicted scene and emerge at the location represented by the artwork, provided you have physically been to said location or have detailed firsthand knowledge of it. Creatures emerge at the physical location from which the depicted scene appears to have been viewed. The portal is the exact dimensions of the artistic work. An artistic work must be at least 1 foot in height and width to be entered feet-first, and at least 5 feet in height and width to be walked through. The artistic work returns to normal and remains in tact once the spell ends. You may also end the spell early as a bonus action. If a creature is only partly through the portal when the spell ends, they are pushed back 5 feet away from the entrance. In order for the spell to function, the artistic work must be a somewhat accurate depiction of the location as it exists in the present, and it must be on the same plane of existence.