The unusual patterns in this rock formation result from two distinct modes of weathering.

A tunnel with windows, so you don't miss out on the impressive views.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

A wooden sculpture sits rather out of place in this Mexican beach town.

A lovers' beach, tucked below the surface of the island, provides a safe haven for romance.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

A Lovecraftian altar of nightmarish bronze chairs sits ominously on a boardwalk in Puerto Vallarta.

Home to items never before seen by the public.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

Take shelter from Hawai'i's tropical heat under the massive canopy of largest Banyan tree on the island.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.