19th-century operating theatre in which the use of ether was first demonstrated - plus, a skeleton and a mummy!

The Boston square dedicated to the dark poet who was born nearby.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

Two thousand artifacts from around the world collected by one woman who loved to travel.

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

This Boston medical museum features the skull of the famous medical case of Phineas Gage.

An enormous, inside-out glass globe built in 1935.

After a short-lived attempt to bring America in line with the rest of the world, this road was left in metric.

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

The 28,000-year-old specimen is remarkably intact.

She stares out across six lanes of traffic, clutching a musket and infant with determination.

An astounding collection of medical specimens, including bits of President Lincoln.

Live data is transmitted from the Atlantic coast to instantly recreate the ocean waves in this fountain at the NOAA headquarters.