A railroad tunnel that, upon its completion, was considered one of the engineering marvels of the modern world.

The story behind the mysterious symbol painted in front of the historic university's famous Rotunda.

Thomas Jefferson's estate is home to hundreds of varieties of historic fruits and vegetables.

At Washington's Dulles Airport is a satellite museum (no pun intended) with three quarters of a million square feet of aircraft history.

The resting place of a Civil War celebrity's amputated limb.

The enormous 250-room Vanderbilt mansion conceals hidden doors and secret passageways.

This distinctive Crescent City tradition dates back to the days of horse-drawn carriages.

The world-record holder for the longest bridge stretching continuously over water.

A museum and shop on Bourbon Street located in the former home of the second Voodoo Queen of New Orleans.

The second largest roadrunner in the world stands 11 feet tall in his West Texas town.

A tiny waterway named after a ghost story.

A fruit-loving town welcomes visitors with a giant melon set against the sky.

A remote crossroads honoring a fallen talent.

Steinbeck's old stomping grounds, immortalized in Cannery Row.

One woman's Viking Castle on Lake Tahoe.

An elaborate gift from Claus Spreckels is now a piece of San Francisco history.

Over 315,000 preserved amphibians and reptiles in jars.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

One of the most elaborate displays of Jellyfish is on display at the aquarium.

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

Every year, over 25,000 monarchs overwinter in Pacific Grove.

Two rocks in a perpetual kiss and one of "the most romantic spot in America."

The fairy tale castle of the "fairy-tale king."

This concrete ship has had four careers - World War I tanker, floating amusement park, fishing pier, and artificial reef.