Your journey through the St. Louis Aquarium starts along a freshwater river and the shallow waters of a salt marsh, then moves into the deep, dark abyss of the open ocean. The 120,000 square foot St. Louis Aquarium at Union Station is located within the former mall area within St. Louis Union Station! The address is 201 South 18th street in St. Louis Missouri. For more information, click here.

The St. Louis Aquarium at Union Station is an immersive and engaging experience offering unique perspectives of our underwater world. From the local streams and rivers to the depths of the oceans, take a journey with us and explore the hidden treasures of the Missouri and Mississippi waterways, appreciate the “monsters” of our global rivers, and delight in the stealth and grace of our oceans’ greatest predators.  Passport not required.

Want to dive even deeper into the St. Louis Aquarium at Union Station?  Our engaging animal encounters and immersive interactive programs will take your visit to another level.  Whether you want to learn more about a specific animal or you’re curious about where exactly all the saltwater comes from, we’ve got something to keep your interests piqued.

Check out the recordings of our interactive videos to learn more about marine animals and what it takes to care for them. We are here to help you keep up with the 13,000 animals that live at the St. Louis Aquarium at Union Station.

As we begin our descent to the ocean’s depths, we see an underwater landscape that has been shaped over thousands of years. This 250,000 gallon habitat, the largest in the Aquarium, provides multiple, awe-inspiring opportunities to view the incredible marine life that reside here. Watch Sandbar sharks and Lesser devil rays gracefully swim by. Enjoy a school of silver Pilchards moving in synchrony, and maybe even catch a Pork fish carefully grooming a Goliath grouper during this part of your underwater exploration. Soak up the breathtaking experience of the thousands of animals living in perfect harmony in this underwater paradise.

Union Station has numerous activities nearby the entire family will love! Favorites include the St. Louis Wheel, the  Carousel, a World Class Ropes Course, MIni Golf, The Mirror Maze, the 3D Light Show, and an Incredible Fire and Light Show. There is so much to do you could spend an entire weekend here!

For nearby lodging, click here. For a list of Missouri’s best hiking locations, click here. For a list of fun family activities in the area, click here.