Known as the "Grand Canyon of Texas," Palo Duro Canyon is the second largest canyon in the United States. Its symbol, a soaring hoodoo (a column of multi-hued, eroded rock) earned the name Lighthouse for its pinnacle-like shape and sentry-like position. The rock formation summons hikers to its base, making this a bucket list trek. Though rated as easy by rangers, the three-mile hike rises 900-feet in altitude, and can be strenuous for some. A mostly level, gravelly path passes cacti galore, rainbow-colored cliffs and stony washes en route to The Lighthouse. Selfies at its base are part of the fun.