Large forested park covering an extinct volcano with tennis courts, a playground & 360-degree views.

From their website: Portland’s Mt. Tabor, a volcanic cinder cone, is a very popular destination and features expansive views of downtown Portland, picnic areas, a dog off-leash area, natural surface and paved paths, a playground, a performance stage, tennis, volleyball and basketball courts — not to mention the picturesque outdoor reservoirs that once held the city’s drinking water.