Situated 4 km from Varkala Railway Station, Varkala Aquarium is a top attraction located near Black Sand Beach. Housed in a three-story building with a spiral staircase, it features exotic marine species like scorpionfish, angelfish, koi, and karimeen. Managed by the Kerala Fisheries Department, the aquarium includes educational displays and a 3D theatre. Visitors can also enjoy views of the Varkala Cliff and the Arabian Sea.