Michigan’s most famous shoe tree.

It leads to a former hospital’s old root cellar.

A comedy troupe's collection of bizarre humor.

Housed in the university planetarium, the thousand-strong collection of tiny towelettes includes a used one from the hosts of Car Talk.

A sealed test tube said to hold Thomas Edison's dying breath was given to the inventor's friend and mentee, Henry Ford.

This sprawling bookstore spans four floors and has more than a million books in stock.