Big Spring is the largest in Missouri.

A one-mile hike leads to Greer Spring in a secluded valley.

Falling Spring has a mill and log cabin in a peaceful park setting.

Round Spring was said to be "round as a silver dollar."

American Indians described the color of Blue Spring as "spring of the summer sky."

The Alley Spring Mill is one of the most photographed spots in Missouri.

The base of Black Mountain on Hwy. E west of Fredericktown, Missouri September 2016.

Castor River Shut-Ins in the Amidon Memorial Conservation Area September 2016.

Crystal clear water and pink granite at Castor River Shut-Ins in the Amidon Memorial Conservation Area September 2016.

Castor River Shut-Ins in the Amidon Memorial Conservation Area September 2016.

Hiking at Pickle Springs on a sunny afternoon in September 2016.

Double Arch, sandstone rock formations at Pickle Springs on a sunny afternoon in September 2016.

Dome Rock while hiking at Pickle Springs in September 2016.

Fungus while hiking at Pickle Springs in September 2016.

Box canyon while hiking at Pickle Springs in September 2016.

Rock formation at Pickle Springs on a sunny afternoon in September 2016.

Double Arch while hiking at Pickle Springs on a sunny afternoon in September 2016.

Waterfall was dry today while hiking at Hickory Canyons Natural Area. September 2016

Hiking trail above the St. Francis River by Silver Mines. September 2016

Silver Mines Dam on the St. Francis River. September 2016

St. Francis River at Hwy D by Silver Mines. September 2016

Shut-ins on the St. Francis River in the Millstream Gardens Conservation Area. September 2016

Fence lizard keeping an eye on me while sunning on a rock in the shut-ins at Millstream Gardens.

Shut-ins on the St. Francis River in the Millstream Gardens Conservation Area. September 2016

Wildflowers by a creek while hiking in the Young Conservation Area Labor Day Weekend.