Visit in one day two milestones in Colombia below the surface: the Salt Cathedral and the mines of Nemocón. Just 34 miles away from Bogotá explore mirrors of water that reflect the patterns made by lighting inside a cave with hundreds of years and galleries filled with colors and history, then go to the heart of the mountain where awaits the only underground church in the world, located in what constitutes a monumental work of engineering, architecture, and design.