At the base of the Golden Gate Bridge, a small sign basically begs for a high-five.

Louisa May Alcott based “Little Women” on her experiences growing up in this house with her sisters.

The lecture hall where Alexander Graham Bell first demonstrated the long-distance phone call.

One of the most accessible undersea plane wrecks in the world.

A Harvard-area eatery preserves the uncovered tiles of its century-old predecessor.

This kaleidoscopic mural shows Bob Dylan throughout his transition from young troubadour to Nobel laureate.

The first piece of public art dedicated to LGBT rights.

Once a year, thousands of naked cyclists flood the streets of a Seattle neighborhood.

A room in New York City that contains 250 cubic yards of dirt.

New York's oldest concrete structure is being preserved thanks to the gentrification of Whole Foods.

Volunteer-run library dedicated to exploring five decades of activism history.

An unexpected Easter egg lurks in the background of a cherub wall relief at the Breakers mansion.

255 feet of suds, scrubbers, and blow dryers.

To avoid the demolition costs this abandoned drawbridge was simply left in the up position.

Legend has it the commander of the defenders drew a fateful line in the dirt with his sword just before the final battle.

The headquarters of one of the world’s longest-running humor magazines bears a noticeable resemblance to a head wearing a Prussian helmet.

This giant monument of the RCA mascot is a beloved fixture in Albany, New York.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

Chicago's Navy Pier on Lake Michigan was a training hub for aircraft carrier pilots during WWII.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

An ivy-covered arch bridge dedicated to Tejano music singer and legend Rosita Fernandez.

A little marble compass above George Washington's (empty) tomb in the Capitol marks where D.C.'s four quadrants intersect.

The oldest building in the District of Columbia was preserved because of a mistaken connection to George Washington.

On the Fourth of July this area will transform into a Pompeii-like storm of falling embers and ash.