This giant bronze image of Christopher Columbus embarked on a voyage of its own.

The abandoned remains of this once-thriving hotel looms over the city, awaiting an uncertain future.

This bleach-white graveyard overlooking the ocean is accessed through a tunnel.

This niche museum devoted to ancient religious artifacts is shaped like the very thing it displays.

Once the grandest synagogue in medieval Spain, it now stands as a memorial of the 15th-century Jewish exile.

The fragmented remains of a massive public bath connected to the city's water supply.

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

Every year, the colorful murals of Montreal get a complete makeover.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

Charleston's historic city jail once held everyone from pirates to Civil War POWs.

Affectionately known as "Lord Bot," this historic statue has a cult social media following and rightly claims to be “the most metal inhabitant of the Wren Yard.”

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

This massive blockhead sculpture hides an entire library.

For decades, Puerta del Sol has been illuminated by a giant, guitar-wielding bottle of sherry.

Five million people are laid to rest here, more than the population of Madrid itself.

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

Legend has it that President Grant’s frequent drinking in the lobby gave rise to the term “lobbyist.”

The house where John Wilkes Booth conspired with his co-conspirators.

A three-story tower of books about Abraham Lincoln is one of the more unusual monuments to the president.

During the Industrial Revolution this “Temple of Invention” was full of intricate miniature machines and gadgets.

A tour de force of a fountain, memorializing a man who loved fountains more than anything else.

This elaborate towering structure was once famed for its revolutionary height.

Yo, Adrian!