The oldest surviving botanic garden in the United States.

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

Golden and naked, the figure that was once the highest point in New York is all that remains of the second Madison Square Garden.

Yo, Adrian!

This little-known collection holds everything from "Dracula" notes, to the manuscript of "Ulysses," to the forged works of Shakespeare.

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

World's first "penitentiary," meant to be humane, drove men insane.

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

Dr Barnes' $25 billion private collection of art and arboretum.

A layered tribute to the work of mosaicist Isaiah Zagar.

Alexander Hamilton’s creation caused quite a bit of controversy.

Instruments, apparatus, and rare books all relating to chemistry and its related sciences.

An Irish Memorial commemorating those who perished due to potato blight.

Step into a pastel time capsule where candy is truly dandy.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

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

The last of Philadelphia's wood-paved streets is now a landmark of terrible engineering.

This beloved marketplace mascot poops money and grants good luck.

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

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

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

Over 100 towers were built in Bologna during the Middle Ages, but only 22 survive.

Giant eggs, walls of bread, and nightmare surreality mark the largest collection of works by Salvador Dalí.

A shining memorial to a Belgian hero is said to bring luck to anyone who touches it.