Niagara Suspension Bridge.

Niagara Suspension Bridge.

Niagara Suspension Bridge.

Niagara Suspension Bridge.

Rapids and head of First Sister Island, winter.

Cataract House from Goat Island, winter.

Cataract House from Goat Island, winter.

Below Goat Island, winter.

Below Goat Island, winter.

Sunset from below Goat Island winter.

Sunset from below Goat Island winter.

View near Terrapin Tower winter.

Ice cave in front of American Falls.

Ice cave in front of American Falls.

Ice cave in front of American Falls.

Ice cave in front of American Falls.

Ice cave front of American Falls winter.

Ice cave in front of American Falls.

Interior of Cave of the Winds, winter.

Interior Cave of the Winds, looking out, winter.

Entrance to Cave of the Winds, winter.

Ice mounds in front of American Falls.

Terrapin Tower from below, winter.

Below Goat Island, winter.

Bridge to Luna Island, winter.

Bridge to Luna Island, winter.

Ice grotto.

Ice grotto.

Ice grotto.

Bridge to Luna Island, winter.