  We report the detection of a ring like HI structure toward l=90.0, b=2.8 with
a velocity of v_LSR=-99 km/s. This velocity implies a distance of d=13 kpc,
corresponding to a Galactocentric radius of R_gal=15 kpc. The l-v_LSR diagram
implies an expansion velocity of v_exp ~ 15 km/s for the shell. The structure
has an oblate, irregular shell-like appearance which surrounds weak infrared
emission as seen in the 60 micrometer IRAS data. At a distance of 13 kpc the
size of the object is about 110 x 220 pc and placed 500 pc above the Galactic
plane with a mass of 1e5 solar mass. An expanding shell with such a high mass
and diameter cannot be explained by a single supernova explosion or by a single
stellar wind bubble. We interpret the structure as a relic of a distant stellar
activity region powered by the joint action of strong stellar winds from early
type stars and supernova explosions.
