Founded in 1910 by Prince Albert I (also a sea captain), this museum and aquarium are must-sees in Monaco. The prince went on dozens of expeditions, and the exhibits are the fruits of his explorations: For example, the skeleton of a whale featured in the museum’s zoology room. And the aquarium – widely considered one of the best in Europe – contains more than 90 tanks, one of which is a shark lagoon. 

Most travelers highly enjoyed their visit here. Many said it's a great place to bring kids, as the exhibits are engaging and there are plenty of exotic animals and fish to see.

Open daily year-round, the museum welcomes visitors between 9:30 and 10 a.m and closes anywhere from 6 to 8 p.m., depending on the time of year. Tickets cost between 11 and 14 euros (about $12 to $16) for adults depending on the day; discounts are available for children. For more information, visit the website.