19th-century scientists would make the pilgrimage here to verify the precision of their measuring sticks.

Since 1887, this old-school shop has stacked its shelves with extraordinary coffees and teas.

English antique dealers with a taste for the unusual.

Scattered throughout London are ancient remnants of the city's former bounding wall.

A 2000-year-old Roman amphitheater lies just below Guildhall Yard.

An alleyway plaque is all that remains of the independent Texas' envoy that forgot to pay their rent for over a century.

The site of London's first coffee house has been serving refreshments of one kind or another for 360 years.

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

A historic London pub with prison cells in the cellar and a "spy room" on the second floor.

The quaint little store that is said to have inspired a famous Dickens novel was only given its name after the book was released.

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

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

This building holds the embalmed remains of the leader of the Bolshevik Revolution.

In Florence's great Duomo, a 26 foot fresco honors a mercenary famous for attacking Florence.

Some say this medieval church is where the poet Dante married his wife and also met the love of his life.

Many famous English poets including Elizabeth Barrett Browning are laid to rest at this Swiss-owned cemetery in Florence.

More than 450 years ago, an Italian nun became the first woman to paint the iconic subject.

Memorials at a Florence railway station remember the citizens who were deported from Italy and sent to extermination camps.

An extraordinary house museum and cabinet of curiosities in the heart of Florence.

This strange bovine gargoyle is said to have been put in as a passive aggressive form of revenge.

A medieval weapon rumored to have been used by the brilliant poet himself.

Legend says this mysterious stone head belongs to a woman who was petrified by an alchemist.

The mummified relic of St. Antoninus.

Secret refuge and museum of the Duke of Florence.