The Skyway continued to travel through the mountain for the next sixteen years, but its passageway was now enclosed in similarly themed ice caves. Following the closure of the Skyway in 1994, the cavernous holes through which the Skyway buckets had traveled were partially filled in. The holes in the Tomorrowland face remained mostly intact, and a grotto filled with glimmering crystals was installed nearby. An abandoned crate labeled "Wells Expedition" was also added as a tribute to Frank Wells, who had died earlier that year. The bluish glow of the crystals is easily seen from the ground at night.