Question: How long does it take to drive from Towamba to the town built on undulating land adjacent to the third-deepest natural harbor in the southern hemisphere?

Context paragraphs:
No Name Harbor (Key Biscayne): No Name Harbor is a natural harbor on Key Biscayne, Florida.  It is located within the boundaries of Bill Baggs Cape Florida State Park.  In the 19th century, the site served as a food-rich rookery for herons, egrets, and other species of wildlife.  Originally, the site was privately owned prior to the creation of the state park.  Several development plans indicated the land was slated for the construction of condominiums and residential homes.  The surrounding land was cleared for development in the 1950s, and charts identified the body of water as "No Name Harbor".  The plans failed, and the harbor's name was retained.

Eden, New South Wales: Eden is a coastal town in the South Coast region of New South Wales, Australia.  The town is 478 km south of the state capital Sydney and is the most southerly town in New South Wales, located between Nullica Bay to the south and Calle Calle Bay, the northern reach of Twofold Bay, and built on undulating land adjacent to the third-deepest natural harbour in the southern hemisphere, and Snug Cove on its western boundary.  At the 2016 census , Eden had a population of 3,151.

June: June is the sixth month of the year in the Julian and Gregorian calendars and the second month to have the length of 30 days. June contains the summer solstice in the Northern Hemisphere, the day with the most daylight hours, and the winter solstice in the Southern Hemisphere, the day with the fewest daylight hours (excluding polar regions in both cases).  June in the Northern Hemisphere is the seasonal equivalent to December in the Southern Hemisphere and vice versa.  In the Northern hemisphere, the beginning of the traditional astronomical summer is 21 June (meteorological summer begins on 1 June).  In the Southern hemisphere, meteorological winter begins on 1 June.

Barnstable Harbor: Barnstable Harbor is a natural harbor located in Barnstable, Massachusetts that is sheltered by Sandy Neck to the north and the city of Barnstable to the south.  The inner harbor is mostly dredged, while the outer harbor is natural.

Côte Chalonnaise: Côte Chalonnaise is a subregion of the Burgundy wine region of France.  Côte Chalonnaise lies to the south of the Côte d'Or continuing the same geology southward.  It is still in the main area of Burgundy wine production but it includes no Grand cru vineyards.  Like the Côte d'Or, it is at the western edge of the broad valley of the river Saône, on the rising ground overlooking the town of Chalon-sur-Saône which is about six kilometers out into the plain.  To the north, across the River Dheune, lies the Côte de Beaune.  To the south is the Mâconnais.  The grapes of the region are predominantly Pinot noir and Chardonnay with some Aligoté and Gamay also grown in vineyards spread over a stretch of 25 kilometers long and 7 kilometers wide of undulating land in which vineyards are interspersed with orchards and other forms of farming.

South Oyster Bay: South Oyster Bay or East Bay is a natural harbor along the western portion of the south shore of Long Island in New York in the United States.  The harbor is formed by Jones Beach Island, a barrier island on the southern side of Long Island.  It is approximately 3 mi (5 km) wide between the two islands, and approximately 15 mi (24 km) long.  It links to Great South Bay on its eastern end and opens to the Atlantic Ocean through inlets on either side of Jones Beach Island.

Towamba, New South Wales: Towamba is a small community, in New South Wales, Australia in Bega Valley Shire.  It is located about forty minutes' drive west of Eden.  At the 2016 census , Towamba had a population of 234 people.

Cape Porpoise, Maine: Cape Porpoise, Maine is a small coastal village in the town of Kennebunkport, Maine, United States, and was the original English settlement of the town.  It is northeast of Dock Square and southwest of Goose Rocks Beach.  The village occupies the mainland adjacent to Cape Porpoise Harbor.  More than a dozen islands protect the deep natural harbor.

San Diego Bay: San Diego Bay is a natural harbor and deepwater port located in San Diego County, California near the U.S.–Mexico border.  The bay, which is 12 mi long and 1 to wide, is the third largest of the three large, protected natural bays on California's entire 840 mi long coastline after San Francisco Bay and Humboldt Bay.  The highly urbanized land adjacent to the bay includes the city of San Diego (eighth largest city in the United States) and four other cities, including National City, Chula Vista, Imperial Beach and Coronado.

Gleadless Valley: Gleadless Valley is a housing estate and electoral ward of the City of Sheffield in England.  The population of the ward at the 2011 Census was 21,089.  It lies 2.5 mi south-southeast of the city centre.  Formerly a rural area, Gleadless Valley was developed as a large housing project with around 4000 dwellings by Sheffield City Council between 1955 and 1962.  It is an area of undulating land drained by the Meers Brook, which has its source on the high ground in the woodland at Gleadless.  Adjacent are Gleadless to the east, Norton to the south-west, Heeley to the west and Arbourthorne to the north.

Supporting paragraphs: Towamba, New South Wales Eden, New South Wales
Answer: forty minutes