The Yucatán Peninsula (/ˌjuːkəˈtɑːn/; Spanish: Península de Yucatán), in southeastern Mexico, separates the Caribbean Sea from the Gulf of Mexico, with the northern coastline on the Yucatán Channel.
Most likely the answer is culture.
Clear rivers in Venice
No Pollution
No litter
He believed that they were originally one giant supercontinent. He had the theory of pangea, which was that all the continents pieced together like a puzzle.