High angular resolution CO observations of small-area molecular structures are presented. The featureless structures seen in the single-dish measurements break up into several smaller clumps in the interferometer map. At an adopted distance of 100 pc their sizes are on the order of a few hundred AU, some of which are still unresolved at an angular resolution of about 3". The clumps have a fractal structure with a fractal index between 1.7 and 2.0. Their kinetic temperature is between 7 and 18 K. Adopting standard conversion factors masses are about (1/10)MJ for individual clumps, and densities are higher than 20,000 cm-3. The clumps are highly overpressured, and it is unknown what creates or maintains such structures.