January 31st Some stray National Historic Register sites around on the trip

First up was the Clifford House, in Eustis Florida, which is also the home of the Historical Society for the town:

The Clifford House (also known as the Clifford-Taylor House) is a historic home in Eustis, Florida, United States. It is located at 536 North Bay Street. On April 4, 1975, it was added to the U.S. National Register of Historic Places. It was owned by G.D. Clifford, an early settler and local merchandiser.
Construction began in 1910 and completed in 1911, the 4,500 sq ft (420 m²). Clifford house has 18 rooms and is home to the Eustis Historical Museum & Preservation Society, which was founded in 1983
Each room of the Clifford House has a different theme, and features period antiques and displays of local history. One room is called the “Indiana Jones Room”, and is dedicated to the memory of Dr. Edgar J. Banks, a professor and archaeologist who spent time in Eustis, and who is held up as the inspiration for the character of Indiana Jones.
The Citrus Museum is located next to Clifford House, and features exhibits related to the area's former importance in the citrus industry, including labels, posters, utensils, tools, equipment and other memorabilia

Also in Eustis, was the Woman's Club of Eustis, established in the early part of the Century and still used as a meeting place:

And two locations in Mt. Dora:

The Lakeside Inn, which is a fine old time Inn, 

The Lakeside Inn is a historic site in Mount Dora, Florida. It is located at 100 North Alexander Street. On March 19, 1987, it was added to the U.S. National Register of Historic Places. It was for sale in 2010, and purchased by new owners, who planned to renovate it, later that year. Built in 1883, Lakeside Inn is the oldest continuously operating hotel in the State of Florida. The last of the Grand Victorian Era Hotels still remaining in Central Florida it is said to be the most historic hotel there. Throughout its 130 year history, Lakeside Inn has hosted many noted dignitaries and celebrities, including President Calvin Coolidge and First Lady Grace Coolidge, for a month long stay in the winter of 1930. Lakeside Inn has also been distinguished as the number one venue in the Central Florida Lakes Region for wedding ceremonies and receptions.  

There was also the Mt. Dora train depot, and I found a new marker there, more on that later.