The beautiful behemoth is one of the largest trees of its kind in the United States.

One incredible room in the Santa Barbara Courthouse is covered in wall-to-wall canvas murals.

This grisly effigy displays an early Christian martyr who was skinned alive and beheaded.

The secret medieval communication system will whisk your words above the noise of the crowd.

Five candy-colored villages on the Italian Riviera.

Brass cobblestones mark the places where individual Holocaust victims were taken from their homes.

All you ever needed or wanted to know about America's favorite whiskey, but not a drop to drink.

This railroad and oil tycoon's lavish estate now stands as a time capsule of the Gilded Age.

The alley connecting two of country music’s most historic venues has a rich history of its own.

This bar named after the world's first mixed cocktail was home to one of New Orleans' most notorious politicians.

The oldest standing structure in downtown San Diego.

One of the few remaining carousels built by master amusement park carver Charles I.D. Looff.

L. Frank Baum wrote part of the "Wizard of Oz" series in this wooden Victorian beach resort.

A sculpture of the famous photograph stands on San Diego's "Greatest Generation Walk."

The innocent intentions of this monument are somewhat lost in the sculpture's muscled imagery.

Visitors to this library are in for a real-world education in modernist architecture.

This little gem of Spanish Colonial architecture has been abandoned since the 1950s.

This nonsensical smiling boat shuttles passengers between two places they could've easily walked between.

These massive concrete balls were used to mine gold in Virginia.

These trees are living witnesses to events that inspired poet Walt Whitman’s service during the American Civil War.

An overgrown garden stands as a grim marker of an unrealized dream.

The Kirkland Monument remembers a selfless Civil War hero who braved the battlefield to give water to his dying enemies.

This war hero's old shop remembers the fine line between medicine and quackery during the Revolutionary War.

This innocuous New Mexico storefront was once the secret jump-off spot for Manhattan Project scientists.