An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

Shop of curiosities with a dinosaur museum tucked in its basement.

This Niagara Falls tourist trap is a world bright with neon and curiosities that will inspire love, hate, or a mixture of both.

Oldest synagogue in the United States.

A giant lumpy candle serves as a beacon for this highly scented pit stop.

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

There must be a pun in this haystack somewhere...

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

Visit the monolithic tomb of America's most famous general.

A bit of retro transportation flair preserved in the world's largest department store.

A popular European tradition makes its way to the states on one of America's most famous bridges.

Elevated freight railway turned wildly successful urban park.

This beloved marketplace mascot poops money and grants good luck.

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

The sounds of the world's largest fully functioning pipe organ dazzle shoppers at a Philadelphia Macy's.

A daily replay of the experiment that proved the rotation of the Earth.

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

Yo, Adrian!

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

This plaque is dedicated to one-half of the Magliozzi brothers and their hit radio show, 'Car Talk.'

This tiny, painted door at the base of a tree stump has been a fixture of the Harvard University campus for decades.

In 1958, an MIT fraternity pledge laid down on this bridge and instituted a new, unique unit of measurement.

The world's largest piece of copyrighted artwork.

A former waterfront market is now in the center of town due to some interesting Boston engineering.