Houston hotel unveils largest spa in Texas with one-of-a-kind services Behold the new Float Pool at the Trellis Spa. Photo courtesy The Houstonian Hotel & Spa Given the abject travesty that 2020 has been for so many, a little pampering is more than in order. Perfect timing, then, that a beloved Houston getaway has announced that it will expand and reopen early next year as the largest spa in Texas. The Houstonian’s Trellis Spa will unveil its sprawling new 26,500-square-foot hideaway in February 2021. A major draw promises to be the new 6,500-square-foot Soaking Pools and Garden, unique in the entire Lone Star State, according to a press release. The new social space was designed by the award-winning firm, Blu Spas Inc., and inspired by bathing cultures found around the world, per the hotel.