Things to do in the Greune/New Braunfels area:

Greune Hall -"the oldest continually run dance hall in Texas"

Shop and eat in historic Greune, Texas

Float the Guadalupe River

Schlitterbahn Water Park, New Braunfels

Things to do in San Antonio:

Shop and eat on the Riverwalk

Visit the Alamo

Six Flags Amusement Park

Sea World

San Antonio Botanical Garden

San Antonio Zoo

Fredericksburg, Texas

Texas Wine Country (1.5 hour drive from New Braunfels)

Visit more than 75 wineries