First, the confusion, because it costs people a morning. There are two Deering estates on Biscayne Bay, built by two brothers, about eight miles apart. Vizcaya, in Coconut Grove, is James Deering's Italianate villa with the formal gardens and the stone barge. The Deering Estate, in Palmetto Bay, is Charles Deering's — older brother, different temperament, different building, and far fewer visitors. They are not the same place and you cannot walk between them.
Charles Deering bought up most of the little bayfront town of Cutler between 1914 and 1917 and absorbed it into his property. What survives from the town is Richmond Cottage, a wooden house built in 1896 by Samuel Richmond, extended and opened in 1900 as the Richmond Inn — the first hotel between Coconut Grove and Key West. It is one of the oldest wooden structures left standing in Miami-Dade County and the last piece of Cutler.
Next to it Deering built the Stone House, finished in 1922: Mediterranean Revival, cut coral rock, iron grilles, built partly to hold an art collection that at one point included work by Whistler and Sargent. He lived there until he died on the property in 1927. The state bought the estate in 1985 and it is run today as a historic site and nature preserve.
The part that genuinely has no equivalent in Miami is behind the houses. The estate's 444 acres take in pine rockland, hardwood hammock, mangrove and salt marsh, and within them sit the Cutler Fossil Site — a solution hole that yielded Pleistocene megafauna bones and evidence of Paleoindian occupation — and the Cutler Burial Mound, a Tequesta mound and one of very few prehistoric mounds still intact in the county.
You reach those on a guided natural-area walk, not on your own. Book it.