We've been enjoying exploring Saint Augustine, FL for the past 2 days.
Nonchalance is still docked at the municipal marina downtown. We didn't have to go out to anchor in the river because cancellations of other's marina reservations let space open up, which is nice because it has been cold and it rained yesterday. Saint Augustine is really a very nice tourist city without too much of the "gorpy" rows of tourist shops.

Walking the narrow brick paved streets you see lots of art galleries, restaurants, museums, neat archetecture and more.
This is one of the residential streets lined with over-arching liveoak trees draped with spanish moss.
Today, we visited Anastasia Island, one of the barrier islands for St. Augustine, and saw the Saint Augustine Lighthouse, which was built in the 19th century and has now been completely and lovingly restored and continues to operate as an official navigation signal, visable for 27 miles out to sea.
You can climb the 210 stairs to the top to see the fresnel lens of the light, which is almost artwork by itself. It has now been converted to electric power, but before 1910 it used to burn first whale oil and then molten lard, after whale oil became scarce.
The view from the top of the lighthouse is excellent.
Anastasia Island also has coquina stone quarries. Coquina stone is cut from these ancient shell deposits, shown in the side of the quarry, which have been cemented together over eons to become stone.

It can be cut into blocks like this and used for building buildings, just like other types of stone.
The lower picture is a blowup of the first one, showing the shells in the stone. The Saint Augustine fort "Castillo de San Marcos"was built entirely out of coquina stone and it was impervious to cannon fire because the stone absorbed the cannon shot instead of cracking and breaking.
Coquina was used extensively in and around St. Augustine to build buildings, including this oldest house in Florida, built out of coquina about 1720. It was originally a one story house but it was extended to 2 stories in the 1770s. It's now an historic landmark and open to the public for tours.