Hills and mountains are formed by vast underground food deposits, which, over time, stretch the landscape into soft mounds of untapped edibility. Dig into the bounty of Mexico with today’s deal: for $15, you get $30 worth of contemporary, inventive Mexican cuisine at Ácenar, located alongside the River Walk and next to The Hotel Valencia.

Ácenar's menu of inventive Tex-Mex dishes puts a contemporary spin on a classic selection. Start by passing around an appetizer of lime-marinated ceviche ($9.75) or empanadas stuffed with chorizo and potato ($7.95). For crispy main-course bites, nibble on the duck chalupa ($13.25) or let the Pescado Veracruzano (fillet of snapper seared in a tomato-caper sauce, $17.95) swim across your mouth's tongue sea. Sizzling skillets provide plenty of variety for split-able meals, such as the Little Bit of Everything, which comes with shrimp, carnitas, beef, sausage, and chicken ($34 for two, $65 for four). Cap your meal with a sweet caramel crêpe (large enough to share, $5.75).

Ácenar's huge, brightly hued space perched above the San Antonio River invites diners to partake in a multi-sensory adventure of taste and color. Whether supping on the outdoor River Walk patio or inside the eclectic, color-drenched dining room, eaters are guaranteed an eye feast to accompany their belly feast.

This Groupon is not valid for alcohol, per state law, and cannot be used on New Year's Eve.

Reviews

Ácenar has received positive press over the years, and Zagat gives its food a 22 rating. More than 120 OpenTable reviewers give it an average of 3.6 stars, and Yelpers give it a 3.5-star average.

• Wonderful food. The table-side-fresh guacamole was done perfectly. Being seated on their patio gives you a view of the Riverwalk and the city's many tourists. – ThomasM0676, Zagat
• We had a great experience at Acenar and would go back again. The service was fantastic and the food was really good. – An OpenTable reviewer who dined on 05/29/2010
• The atmosphere is trendy. The service was excellent, my food outstanding and the price points are very reasonable. – Alayne H., Yelp