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.

An obscure public service from the U.S. government that redeems burnt, moldy, and soiled old greenbacks.

Australia's largest medical museum featuring a 19th-century pharmacy.

This controversial museum includes such detested exhibits as a chocolate suicide bomber and fecal-smelling digestion machine.

Crypt mausoleum in cathedral's basement contains relics of third century Roman martyr, Saint Vibiana.

A famous hotel houses an impression collection of mini dioramas and giant doll houses.

One woman’s obsession gave birth to this lovely oddity at the Boston Public Library.

A wonderfully strange collection of 500+ stuffed frogs doing people things.

Experience a charming 1930's version of "infotainment."

This series of landscape dioramas tell the story of New England forestry in exacting miniature detail.

Where dogs like the rare "Fire-Tailed Border Cocker" run free on the mountainside.

These molds for fiberglass statues have formed an eerie, accidental sculpture park.

A terrific purveyor of natural history objects and curios.

Manhattan's Thirteenth Avenue was made on landfill then deliberately destroyed — apart from one small, obscure block.

The oldest operating apothecary in the US has treated everyone from Thomas Edison to Mark Twain.

Play heads or tails with thousands of different coins.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

An odd, ancient window that may have once been part of a brutal prison is embedded in the side of New York's Police Plaza.

Manhattan's lighthouse, erected at the insistence of the unsinkable Molly Brown.

Discover the taste of mold.

Hear the tales of New York's most notorious criminals.

Where now stands a 42-story condominium tower of marble, glass and steel was once the central market of New York’s slave trade.

These historic buildings once housed the headquarters of one of the most infamous gangs of New York.

A dark, dank room in subterranean Manhattan was the site of a ghastly murder.