Loretto Chapel - Santa Fe, New Mexico

207 Old Santa Fe Trail - The original chapel was completed in 1878 with more additions in later years.  Read more about the history of the chapel here.

Tuckahoe - Jensen Beach, Florida

1921 NE Indian River Drive - Also known as the Leach mansion, Tuckahoe is a lovely 1938 Mediterranean Revival/Art Deco home that is now used as an event space.

I'm thinking this might be the remnants of an old dock or pier for the property.

I believe this is where the pool originally was.  There's a picture of it here.