Hopewell Rocks Tidal Exploration Site, New Brunswick, Canada, 2005—Hopewell Rocks are the remains of a massive mountain range, formed during the Carboniferous period (ca. 350 million years ago) and therefore older than the Appalachians, shaped into discreet rocks by erosion. They lie on the banks of the Bay of Fundy, which was formed during the last ice age, 110,000 to 12,000 years ago. The Bay of Fundy has an exceptionally great tidal range, leaving the sea floor dry enough to walk on at low tide, though muddy. Lush vegetation grows from the top of many of the rocks, giving rise to the nickname “Flowerpots Rocks.” A natural tunnel through one of the rocks made this photo possible.