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

Huge masonic hall in Philadelphia with lavishly themed rooms.

The first American department store, and home to the largest operating musical instrument in the world.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

A collection of full-size movie monsters opened to the public.

This stone in Lexington honors a formerly enslaved man who fought during the American Revolution.

A former zoo turned public park, where visitors can hang out in the old animal cages.

Small island science organization offers public the chance to participate in research.

Artifacts of whaling, with both its perils and adventure, are housed in this museum in a former candle factory.

The highest point in the state of New Hampshire, and while unlikely "the worst weather in the world," it sure seems that way to hikers.

"the sweltering inhabitants of Charleston and New Orleans, of Madras and Bombay and Calcutta, drink at my well . . . The pure Walden water is mingled with the sacred water of the Ganges."

The sweetest graveyard in the world is filled with headstones for dearly de-pinted ice cream flavors.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

The world's largest piece of copyrighted artwork.

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

I-95's Tijuana-style celebration of kitsch at the Carolina border.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

Ice cream stand, snack bar, and time capsule of milk conveyance.

This historic hotel invented the chocolate brownie.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

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

Famously misunderstood wonder of the ancient world

In 2004, a Dave Matthews Band tour bus dumped 800 pounds of waste off a bridge and onto an unsuspecting tour boat below.

The phrase "the shot heard around the world" was coined after a skirmish at this bridge.