Corinth Canal in Greece is a very popular architectural attraction. It connects the Gulf of Corinth with the Saronic Gulf in the Aegean Sea. This canal is carved down into the rock. It is around 4 miles long and is only 70 feet wide at the base.
The Crystal Lagoon, located at the San Alfonso del Mar resort in Algarrobo, Chile, is the worlds largest outdoor pool, stretching more than half of a mile and filled with 66 million gallons of water. beaches-other