MLJET, CROATIA - 25 AUGUST 2015: Tour boat full of tourists docks at the pier on Mljet Island.
BISEVO, CROATIA - 18 AUGUST 2015: Tourists on boat tour inside the Blue cave. The cave is only blue for 1 hour around noon, so tourists rush to see the magical color.
BISEVO, CROATIA - 18 AUGUST 2015: Tourists on boat tour inside the Blue cave. The cave is only blue for 1 hour around noon, so tourists rush to see the magical color.
BISEVO, CROATIA - 18 AUGUST 2015: Tourists driving on boat after visiting Blue cave. The cave is only blue for 1 hour around noon, so tourists rush to see the magical color.
BISEVO, CROATIA - 18 AUGUST 2015: Tourists on boat passing by another group of tourists in front of Blue cave. The cave is only blue for 1 hour around noon, so tourists rush to see the magical color.
View of Adriatic sea from a speed boat, Bisevo island, Croatia
BISEVO, CROATIA - 18 AUGUST 2015: People relaxing on boat after swimming in front of Blue cave. The cave is only blue for 1 hour around noon, so tourists rush to see the magical color.
Passenger boat returning from blue cave on Bisevo island in Croatia
Boat tour in a Blue cave on Bisevo Island in Croatia
BISEVO, CROATIA - 18 AUGUST 2015: People relaxing on boat after swimming in front of Blue cave. The cave is only blue for 1 hour around noon, so tourists rush to see the magical color.
Zurich, Switzerland - June 25, 2018: Tourists waiting for a tour boat on the banks of the Limmat river in Zurich.