The park has a natural aquarium with endangered species that can be found only in the San Marcos River and archeology exhibits with artifacts dating back 12,000 years. Some of the original buildings still stand, such as Dr. Merriman's log cabin, General Burleson's home, and a 100 year-old gristmill that still operates. Ralph the Swimming Pig no longer performs, but you can still take glass bottom boat rides and view the bubbling springhead of the San Marcos River. Aquarena Springs has a restaurant and other concessions, a gift shop and picnic sites. The grounds are tropically landscaped.
Picturesque swans sail over Spring Lake, and fountains create water sculptures.
Aquarena Springs also has a golf course and conference center. The original Park Hotel still stands and has been totally renovated. The hotel has a man-made swimming pool.