Browns Lake Bog is one of a handful of sites in Ohio which contain an open kettle-hole lake surrounded by a floating sphagnum moss mat. The bog and surrounding forest were purchased by The Nature Conservancy in 1966. The preserve was declared a National Natural Landmark in 1968.

• Kettle-hole lake bog
• 1-mile trail system and parking lot

The preserve lies in the Glaciated Allegheny Plateau region of northeastern Ohio. The bog and lake are glacial relicts, and the knolls in the northeast corner and southern part of the property are glacially formed hills called kames.

The naturally acidic properties of sphagnum and its ability to insulate the water from rapid air temperature changes provide the special conditions needed to maintain the boreal plant community including round-leaved sundew, large cranberry, grass-pink orchid and marsh five-finger. The lowland woods south and northeast of the main bog support shallow ephemeral pools during much of the year.

Located in Wayne County 2 miles west of Shreve on Brown Road. A parking area is located on the south side of the road next to the preserve sign.