The remains of the great moral philosopher reside in a university in London.

The anatomical-pathological collection of a man who changed surgery.

One part local history, 99 parts gruesome haunted house.

A toy store with a century-long history preserves the craftsmanship of playthings of the past.

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

A gruesome and mysterious ancient sculpture of a pagan deity from the Roman occupation of Celtic Britain.

This intriguing Bronze Age artifact spent centuries hidden within a Welsh faerie hill.

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.

A naturally mummified 2,000-year-old man.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

These official units of measurement—including chains and perches—lie hidden beneath tourists' feet in a popular London hub.

Wild lights and sound effects turn a walk through some caves into an eye-popping 1960s tourist attraction.

An abandoned town is hidden in Great Smoky Mountains National Park.

The 80-foot tire that looms over Michigan's I-94 was once a Ferris wheel in the New York World Fair.

A sealed test tube said to hold Thomas Edison's dying breath was given to the inventor's friend and mentee, Henry Ford.

One of the few working locomotive roundhouses in the United States.

The only surviving prototype for Buckminster Fuller's house of the future.

This lighthouse and shipwreck museum keep a torch burning for the memory of the SS Edmund Fitzgerald.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

World's largest Christmas store.

The world’s largest Masonic temple was saved by the White Stripes.

What was once the largest NFL stadium.

This sprawling bookstore spans four floors and has more than a million books in stock.

Island where motor vehicles are banned -- home to the only carless highway in the United States.