One of the most popular places to visit while on vacation in Wellfleet is the Wellfleet Bay Wildlife Sanctuary, located about a mile from Wellfleet Hotel the Southfleet (directions). Their beautiful new “green” nature center is a vacation must-see.  Beautiful walking trails, views of Wellfleet Harbor with exhibits and aquariums inside their award winning nature center. The sanctuary is operated by Mass Audubon and is open daily 9:00 AM – 4:30 PM, walking trails open at 8:00 AM and close at dusk.