Question: What is the oldest structure in Miami?
Answer: Cape Florida Lighthouse in Key Biscayne.
The lighthouse is the oldest standing structure in all of Miami-Dade County. Though first built in 1825, it was reconstructed in 1846 after suffering extensive damage during the Second Seminole War. After being decommissioned and serving a stint as the headquarters of the Biscayne Bay Yacht Club, it was later restored and has a museum filled with information about the local history.
