Houston City Tours provides guided city tours to all major attractions. City Tour See the historical and cultural delights of Houston on a hop-on hop-off sightseeing tour by Double-Decker bus. From an excellent vantage point on the top deck of the bus, listen to fascinating live commentary as you cruise past important landmarks Rejoin the tour at a time to suit your schedule at any conveniently located stops along the route. BOOK NOW! NASA TOUR Uncover the mysteries of outer space on an exhilarating visit to Space Center Houston, the official visitors center for NASA’s Johnson Space Center. Ride a tram on an orientation tour of the Space Center; see enthralling exhibitions of full-size rockets and rock samples; and marvel at the real Apollo 17 space shuttle, which returned from the moon in 1972 also enjoy Independence Plaza. BOOK NOW! GALVESTON ISLAND TOUR Houston and historic Galveston on a FUN 6-hour tour.