The collection contains over 25,000 items and details the painful dental practices of the past.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

A commemorative plaque at the door pays tribute to an "American Patriot" known for his betrayal.

An eccentric Victorian aristocrat's enormous collection of medieval armor and weapons from around the world.

The world's largest occupied bat houses hold hundreds of thousands of flying mammals.

Though illegal, city officials have made an exception for this work of art.

This Florida sinkhole hides a rainforest-like micro-environment in its depths.

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

Touching mementoes from those who didn't make it back from World War I still hang in one of New York's oldest bars.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

A reminder to choose water over wine since 1888.

Love, knishes, and best wishes from this legendary Lower East Side bakery.

Brooklyn's most iconic restaurant, resurrected.

Come for the waffles, stay for more waffles.

Beautiful mosaics cover the first stations opened on New York City's newest subway line.

The walls are decorated with whimsical murals painted by the creator of the Madeline franchise.

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

One of London’s rare Tudor-era buildings is a fate-defying gatehouse for a church.