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The Treaty Oak is an octopus-like Southern live oak (Quercus virginiana) in Jacksonville, Florida. The tree is estimated to be 250 years old and may be the single oldest living thing in Jacksonville, predating the founding of the city by Isaiah Hart during the 1820s. It is located in Treaty Oak Park in the Southbank area of Downtown Jacksonville.

The St. Elmo W. Acosta Bridge spans the St. Johns River in Jacksonville, Florida on a fixed span. It is named for City Councilman St. Elmo W. Acosta, who convinced voters to approve a $950,000 bond issue for the original bridge at the site. It carries a total of six lanes of SR 13 with the two-track Jacksonville Skyway in the median and sidewalks on the outside.

The CSX Transportation Building is a 251 feet (77 meters) high-rise office building located in Jacksonville, Florida. Completed in 1960, the building currently serves as headquarters for CSX Corporation. The building is located in the Northbank area of Downtown Jacksonville, along the banks of the St.

The Main Street Bridge, officially the John T. Alsop Jr. Bridge, is a bridge crossing the St. Johns River in Jacksonville, Florida. It was the second bridge built across the river. It carries four lanes of traffic, and is signed as US 1/US 90 (SR 5/SR 10). A lift bridge, it opened in July 1941 at a cost of $1.5 million.

SunTrust Tower (originally American Heritage Life Building) is a skyscraper in the downtown area of Jacksonville, Florida, at the northwest corner of Independent Drive and Laura Street. Standing 357 feet (109 meters) tall, it is the city's sixth tallest building. It was formerly known as the Jacksonville Center and the Humana Building, among other names.

Wells Fargo Center (originally Independent Life Building) is a skyscraper in the downtown area of Jacksonville, Florida, at the southeast corner of Bay and Laura streets. Standing 535 feet (163 meters) tall, it is the city's second-tallest building. It was formerly known as the Modis Building until 2011, when Wells Fargo acquired the naming rights.

Cornerstone Construction Group is an American construction, design and consulting business based in Redondo Beach, California, United States. The firm specializes in Office of Statewide Health Planning and Development (OSHPD) projects for medical centers in Southern California.

Haskell is an architecture, engineering, construction and consulting firm headquartered in Jacksonville, Florida. It was founded by Preston Haskell in 1965.

One Enterprise Center is a 299.00 ft (91.14 m) skyscraper in Jacksonville, Florida. Located in the Northbank area of Downtown, tenants include Rayonier and CBRE Group. The building also shares a lobby with an adjacent Omni Hotel. The 21-floor structure was designed by Clark Tribble Harris & Li Architects and completed in 1986.

The FEC Strauss Trunnion Bascule Bridge is a double track railroad bridge spanning the St. Johns River in Jacksonville, Florida.Completed in 1925 by the Florida East Coast Railway, this structure replaced a single-track swing bridge which opened on January 5, 1890. The current structure is a simple truss bridge with plate girder approaches and a bascule lift allowing ships to pass.