The Museo Soumaya in Mexico City is a private museum founded by Carlos Slim, showcasing over 66,000 pieces of art spanning 30 centuries. With two buildings, Plaza Carso and Plaza Loreto, the museum boasts an impressive collection of European old masters, Mexican art, and sculptures by artists like Auguste Rodin and Salvador Dalí. The building itself, designed by Slim's son-in-law Fernando Romero, is a modern architectural marvel covered in hexagonal aluminum tiles. Admission is free, thanks to Slim's deep pockets, making it a must-visit for art enthusiasts and casual visitors alike.