Paramo del Duende on the Chocò-Valle del Cauca border in Colombia is an isolated, barely-explored paramo in a part of the world that has quite a few very range-restricted endemics - perhaps an undescribed tapaculo or hummingbird lurks there? Also the upper elevations of the San Lucas mountains in Colombia remain unexplored by ornithologists as far as I know, but major safety issues remain there.