Andy's on River Road supplies inflatable fun for leisurely glides through the gently rushing waters of the Frio River. Hop on a shuttle (a $5 value/person) that transports floating pairs from the free parking area to the float-trip drop-off point. Several styles of tubes ($5 value each) gently guide float trippers from the river's edge to its molten middle for a day of buoyant fun; choose from air-stuffed donuts with or without bottoms, or opt for styles equipped with headrests to offer hard-working necks a well-deserved respite. After a long day of kicking back, floaters can kick back in a return shuttle.
Every evening from March to September, just before sunset, as many as 12 million Mexican free-tailed bats erupt from Frio Cave in search of dinner. The bat colony is the second largest in the world and the largest that's open to the public. Tour guides lead a caravan of visitors driving their own cars two miles from the ranch gates to Frio Cave, then guests are taken to the top of a hill to witness the winged spectacle. With the sun low in the sky and the bat signal shining, the cloud of bats bursts forth alongside cave swallows and rock wrens, seeking insects to eat while evading birds of prey such as kestrels and peregrine falcons. After spending the spring and summer mating in Frio Cave, the bats resume their migration to Mexico and the college students return to their dorms.