Houston's Official City Tour! From the HCT Visitors Centre, explore Houston on an 80-minute Houston sightseeing morning or evening tours, which travels by double-deck and single-deck unique open top buses around the city, including sights such as the Convention Centre, Minute Maid Park, Historic District & Market Square, City centre Aquarium, Houston Heritage Society Park, Financial District, Midtown, Museum district, and more. Hop on - Hop Off to enjoy unobstructed views of breathtaking architecture and live onboard commentary. Experience Houston's most noteworthy attractions and explore it like never before! Alternative vehicles may be used according to the number of passengers, weather, or traffic conditions.