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.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

Ironically this massive termite is the mascot for a company that is acclaimed for killing his kind.

Rumors of the occult haunt this upscale 1920s hotel.

The first partially complete dinosaur skeleton was discovered here, forever changing the world's view of the ruling reptiles.

Railroad officials in the early 1900s sought to spare travelers the sight of Roman soldiers’ private parts.

A gorgeous mural outside a beloved D.C. restaurant pays homage to famous Black Americans.

The preamble to the U.S. Constitution written entirely from vanity license plates hangs in the Smithsonian museum.

Architecture lovers won’t stop touching the National Gallery's 19.5 degree marble prow.

An unassuming, powerful monument north of the U.S. Capitol bears witness to the resilience of Japanese Americans during a time of grave injustice.

The unique traffic pattern named for an influential urban planner is also known as the Pedestrian Scramble.

A traveling postal dog covered 48 states and more than 140,000 miles, and he lives on as taxidermy, patched up with a rabbit's foot and a pig's ear.

The first purpose-built art gallery in the United States is once again open as a center of craft arts.

A nostalgic bibliographic gem.

This library and museum is dedicated to the life and literature of the Indianapolis native author.