The Musée Océanographique in Monaco-Ville first opened its doors to the public in 1910. This impressive museum was built by Monaco's Prince Albert the 1st but it is often associated with famed French explorer and naval officer Jacques Cousteau, who served as the museum's director from 1957 - 1988. Cousteau's little yellow submarine still sits on display in front of this massive stone building, which is dramatically perched on the cliff side overlooking the Mediterranean Sea. The lower-level aquarium area is home to 4,000 different species of fish (starfish, seahorses, turtles, jellyfish, crabs, lobsters, sea urchins, sea cucumbers, eels, etc.) including a massive shark tank which can be viewed from all sides. On the upper floors of the museum one can view a variety of interesting displays from Prince Albert and Cousteau's collections including model ships, animal skeletons, tools, and weapons. It's easy to spend a few hours here and still not see everything.