At any time of year, a cruise aboard the River Gorge Explorer into the protected habitat of the Tennessee River Gorge offers a stunning perspective on its striking geography and abundant wildlife. Beginning in mid-October, however, the view gets even more spectacular as autumnal hues cascade down the mountainside like Mother Nature is slowly bumping up the color saturation for the whole region. Aquarium guests have more opportunities to enjoy the sights with daily two-hour excursions and special extended cruises planned for three upcoming Sundays.