An inconspicuous footbridge beloved by San Diego locals.

Behind this beachfront shop lies a spectacular, colorful sea cave with an equally colorful past.

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

America's only nuclear missile silo open to the public.

This remote fort on the Yukon River is a vestige of the wild Alaska gold rush.

The northernmost international land border crossing in the United States.

The king of U.S. high points towers over every other peak on the continent.

An allegedly haunted mansion with a tragic, tawdry past.

An old saloon in the West filled with history, and according to some, a few dozen ghosts.

These remote Florida islands have a history of sea turtles and sunken treasures, and one of the world’s largest coastal brick fortresses.

A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.

This small museum gives visitors a chance to soak up the history of the "sponge capital of the world."

The entire length of the border is marked by a 20-foot-wide slash through the trees.

This public square capitalized on a single Eagles reference to bring some life back to an Arizona town.

Limestone caves with spectacular showcase chambers.

A stone pillar commemorates the surrender of the extraordinary Apache leader.

Life in this isolated, hilltop lighthouse was lonely, but it sure was lovely.

Walk through the actual strap iron cells and solitary chambers of Arizona Territory’s first prison.

The remnants of an early automobile route across shifting sand dunes can still be found in the deserts of Southern California.

This spectacular track has run continuously since 1882.

A giant poultry statue immortalizes one of Alaska's more humorous town names.