San Marcos is nestled on the edge of what is called the Texas 'Hill Country.'  Intestate 35 conveniently slices through the city defining a North - South boundary where Hill Country meets beautiful grass lands;  the transition is a natural fault line called the Balcones Fault. The eastern part of the city is blackland prairie suitable for farming; the western part consists of grassy rolling hills often marked with cacti.  This North - South stretch is often called The Corridor as well and runs along the IH 35 highway between Austin and San Antonio.  San Marcos was founded on the banks of the San Marcos River, considered one of the cleanest and most beautiful rivers in Texas (maybe even the world!).  Founded on the banks of the San Marcos River, the area is considered to be among the oldest continuously inhabited sites in the Northern Hemisphere.

San Marcos was once the temporary site of  two Spanish missions which were relocated from East Texas because of French and Indian difficulties.  The town was laid out for Anglo-American settlers in 1851 along the clear, cold San Marcos River which flows from natural occurring springs right in the middle of town.  Wildlife is abundant in the Hill Country, especially White-tailed deer.  Because of the numerous animal inhabitants, we can also enjoy dove, quail squirrel, fox and an occasional bobcat.  Fishing, watersports and tube floating is enjoyed almost year round in the San Marcos and nearby Blanco Rivers due to the fantastic weather. This is the perfect place to enjoy recreational opportunities throughout the year.

San Marcos is the county seat of Hays County, named after the famed Texas Ranger, Jack Hays and is home to Texas State University and the Aquarena Center.  The city is also the home of San Marcos Baptist Academy; and the alma mater of  President Lyndon B. Johnson.

Attractions
Belvin Street Historic District in San Marcos has superb examples of 19th Century homes along streets shaded by huge live oaks.  This district is well worth a stroll (only a few blocks) in southwest San Marcos.   All are private residences not open to the public except during Tour of   Distinction during the first weekend in May.
The San Marcos River Walkway unites three city parks along the picturesque river, accented by lush landscaping.  Access from Jan Veramendi Plaza, C.M. Allen Pkway. at Hopkins St.   A scenic drive on FM 12 northwest of   the junction with RM 32, the winding ridge route called "Devil's Backbone," offers exceptional views of Hill Country scenery.

Another attraction, Wonder World,   is an earthquake-formed cave, wildlife park, observation tower, and gift shop.   Cave tours are offered every 15 minutes; There is also an Anti-Gravity House, an elevator from cave to Tejas Tower that offers impressive overlook of town and Hill Country.  A miniature train through their wildlife park with animal feeding and petting areas.  Open daily, summer 8 a.m. - 8 p.m.; winter 9 a.m. - 5 p.m.

San Marcos is located at geo coordinates:  

29°52′46″N 97°56′20″W / 29.879387°N 97.938829°W / 29.879387; -97.938829 (29.879387, -97.938829).

Source:  Wikipedia, San Marcos Texas;  texfiles.com