This image shows the ferry landing at Mackinaw City, MI, emphasizing the line of cars waiting to embark for the trip across the Straits of Mackinac. There was no bridge at the time of this photo, and the famous Big Mac bridge would not be completed for another nine years.

There is no description on the back of this card. The identity of the ship shown is unknown.
This card is dated 1948.

This card features the car/passenger ferry called City of Cheboygan, a one time rail ferry of the Ann Arbor Railroad that was converted to automobile carriage in 1937.

There is no description on the back of cards from this era, only the writing shown on the front.
As indicated in the image, this photo is from 1948.

This is an interior view of the restaurant located in the Greyhound Post House and bus station in Mackinaw City, Michigan.

This carefully staged photograph shows the typical accoutrements of a table at a mid-1940s diner: the napkin dispenser, salt and pepper shakers, and a sugar dispenser. These are curiously all clustered carefully in one corner of each table, where in normal use they usually found their way to the center.
The slider shelf on the left hand counter indicates this was a cafeteria style service system. There is a small souvenir counter in the back, and a juke box on the right of the fireplace.
There is no description on the card.

This image shows the exterior and parking lot of the Greyhound bus station in Mackinaw City, MI as it looked in the 1940s. It served as more than just a bus station, as there was a restaurant and showers there as well.

The busses in service at the time are visible in the far right background, next to the sign indicating where additional accommodations and services could be found. The cars in the picture clearly point to the 1940s for this photo. Greyhound no longer serves Mackinaw City, and this building appears to be gone.
There is no description on the back.

This image begins a series of black and white images of the backwoods and bays of Michigan. This is an image of a stand of white birch trees in Wilderness Park, Mackinaw City, Michigan.

The park is over 8,000 acres and covers the most northerly point of land on the lower peninsula of Michigan, looking out over the upper reaches of Lake Michigan. This image likely dates from the 1940s. There is no description on the back.

This image shows two common modes of transporting large logs from the forest to the mill, as exhibited outdoors as part of the Logging Museum at Hartwick Pines State Park.  In the foreground is a sled, where the logs would be piled up on the main body, and a pair of draft animals used to pull the sled.

In the background is a lumber wheel. The logs were attached below the wheel instead of on the axle, and were suspended above the ground to minimize drag as the draft animals pulled the loaded wheel along.
There are several examples of such equipment on outdoor display. This image likely dates from the 1930s.

This continues upward on the Monarch Tree in Hartwick Pines State Park, showing the middle reaches and the underside of the living crown of the tree.

This upper part of the tree with living branches, called the crown, was broken off in a storm in 1992 and the tree died four years later. This image shows what remains of the tree. This image likely dates from the 1930s.

This tree, called the Monarch White Pine, was the tallest and largest of the old growth pines that formed the core of the Hartwick Pines State Park. This image shows the size of the base of the tree, where measurements of circumference are taken.

The sign states:
The Monarch White Pine, Height 150 feet, Diameter 51inches, Circumference 13 feet, 8 inches, Approximately 6000 board feet in this tree.
–The tree was damaged in a storm in 1992 and died 4 years later. This image likely dates from the 1930s.