Hiker in North Window, sunset, western face. North Window is a natural sandstone arch 90 feet wide and 48 feet high, Arches National Park, Utah

Hiker in North Window, sunset, western face. North Window is a natural sandstone arch 90 feet wide and 48 feet high. Arches National Park, Utah.

 Sunrise light on Turret Arch viewed through North Window, winter, Arches National Park, Utah

Sunrise light on Turret Arch viewed through North Window, winter.

 Delicate Arch, dusted with snow, at sunset, with the snow-covered La Sal mountains in the distance. Delicate Arch stands 45 feet high, with a span of 33 feet, atop of bowl of slickrock sandstone, Arches National Park, Utah

Delicate Arch, dusted with snow, at sunset, with the snow-covered La Sal mountains in the distance. Delicate Arch stands 45 feet high, with a span of 33 feet, atop of bowl of slickrock sandstone.
Landscape Arch in winter. Landscape Arch has an amazing 306-foot span, Arches National Park, Utah

Landscape Arch in winter. Landscape Arch has an amazing 306-foot span. Arches National Park, Utah.

 Turret Arch at sunset, winter, Arches National Park, Utah

Turret Arch at sunset, winter, Arches National Park, Utah.

 Hiker in North Window, sunset, western face. North Window is a natural sandstone arch 90 feet wide and 48 feet high, Arches National Park, Utah

Hiker in North Window, sunset, western face. North Window is a natural sandstone arch 90 feet wide and 48 feet high.
Skyline Arch spans 90 feet, Arches National Park, Utah

Skyline Arch

 Double Arch, an amazing pair of natural arches formed in the red Entrada sandstone of Arches National Park, Arches National Park, Utah

Double Arch, an amazing pair of natural arches formed in the red Entrada sandstone of Arches National Park.

 Pine Tree Arch, Arches National Park, Utah

Pine Tree Arch.
Fins. The vertical slabs of Entrada sandstone may become natural sandstone arches, Arches National Park, Utah

Sandstone fins. The vertical slabs of Entrada sandstone may become natural sandstone arches.

 Courthouse Towers, narrow sandstone fins towering above the surrounding flatlands, Arches National Park, Utah

Courthouse Towers, narrow sandstone fins towering above the surrounding flatlands, Arches National Park, Utah.

 Delicate Arch, dusted with snow, at sunset, with the snow-covered La Sal mountains in the distance. Delicate Arch stands 45 feet high, with a span of 33 feet, atop of bowl of slickrock sandstone, Arches National Park, Utah

Delicate Arch, Arches National Park, Utah.
Turret Arch, winter, sunrise, Arches National Park, Utah

Turret Arch, winter, sunrise, Arches National Park, Utah.

 South Window, eastern face, sunrise, winter, Arches National Park, Utah

South Window, eastern face, sunrise, winter, Arches National Park, Utah.

 Balanced Rock, a narrow sandstone tower, appears poised to topple. Sunset, winter, Arches National Park, Utah

Balanced Rock, a narrow sandstone tower, appears poised to topple. Sunset, winter.
Double Arch, an amazing pair of natural arches formed in the red Entrada sandstone of Arches National Park, Arches National Park, Utah

Double Arch, Arches National Park

 Delicate Arch, dusted with snow, at sunset, with the snow-covered La Sal mountains in the distance. Delicate Arch stands 45 feet high, with a span of 33 feet, atop of bowl of slickrock sandstone, Arches National Park, Utah

Delicate Arch, Arches National Park, Utah.