The famous abolitionist’s preserved estate is one of Washington's finest monuments to its great Black citizens.

Light bulbs, scrap wood, and tinfoil comprise this homemade throne of the gods.

The beloved statue at the National Academy of Sciences is oh so inviting to sit on.

Home to items never before seen by the public.

The birthplace of America's favorite fruit-flavored mystery dessert.

A comprehensive collection of Pez dispensers.

On any given day this sprawling market houses literally tons of government-regulated gold, gems, and precious metals.

This artificial archipelago was supposed to resemble a map of the world.

A preposterously luxurious hotel with gold-plated iPads, Rolls Royce chauffeurs, and a staff that trains by watching "Downton Abbey."

The most loyal of little dogs, or a Victorian era publicity stunt?

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

A nearly 500-year-old sculpture depicts a man eating a sack of babies, and no one is sure why.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

This legendary city has been a tourist attraction for centuries.

The hallucinogenic center of the ancient world.

Five sultans and their families rest in eternal splendor, teeming with overlooked beauty and drama.

Jesus' footprints and the first catacombs in the world.

The yawning maw of this pagan visage is said to bite off the hands of liars.

Christ's blood allegedly preserved in a Belgian town.

A little sculpture with a large wardrobe.

From Tintin to the Smurfs, Europe's greatest graphic icons are celebrated in a grand Art Noveau gallery.

Climb inside an iron crystal magnified 165 billion times its normal size.