Lighthousedle
Puzzle #100 was Arecibo Light.
The Arecibo Lighthouse & Historical Park is located in the city of Arecibo, Puerto Rico. Also known as Los Morrillos Lighthouse, it stands as a monument to Puerto Rico's complex history under Spanish colonial rule. Completed in 1898 atop the Punta Morillos headland, this lighthouse represents one of Spain's final maritime investments on the island, built just months before the Spanish-American War transferred sovereignty to the United States.
Read about it on Wikipedia →
What the record says
Puzzle 100 ran on 17 Oct 2026 and the answer was Arecibo Light, played with 6 guesses against 8 columns. On the record: Country - United States; Continent - North America; Height - 10-20m; Material - stone; Heritage - listed. The numbers: Built - 1890; Focal height - 37 m; Range - 14 nmi.
Lighthousedle builds its record from Wikidata - CC0 1.0. The description above comes from the same place the game credits on every reveal: English Wikipedia summary excerpt, CC BY-SA 4.0. The puzzle itself is still playable in the archive, and every answer that has been and gone is listed on the past-answers page.
How it scored
- Country
- United States
- Continent
- North America
- Built
- 1890
- Height
- 10-20m
- Material
- stone
- Heritage
- listed
- Focal height
- 37 m
- Range
- 14 nmi