A bronze plaque at an intersection in Hoboken marks the place where the game of baseball first took shape.

A hidden treasure in London with a rich medieval history, and the resting place of many luminaries.

The former home of the reclusive "Weird Wendels" who dominated New York real estate a century before Donald Trump.

A bit of retro transportation flair preserved in the world's largest department store.

The remains of an ancient Roman teenager are memorialized at the base of a modern London landmark.

The macabre collection of Jacques Sirgent, an expert scholar on the undead and all of their trappings.

A small peaceful park and waterfall tucked amid the urban grind of Midtown Manhattan.

Former hunting lodge of a duke who was an avid collector of impressionist works.

This recently uncovered ad for Lindsay's run at Mayor in 1965 had been hiding for decades underneath a billboard.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

Beggars were miraculously "cured" of their fake ailments when they returned home to this 17th century Paris slum each night.

A partially hidden wall graffitied by spectators of the 1976 Bicentennial, recently rediscovered.

Yo, Adrian!

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

A Victorian cemetery in the heart of Brooklyn remains a popular mecca of morbid curiosity.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

When you're a great Russian Tsar, even your vomit gets a statue.

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

Scenic mount trashmore, Virginia Beach's most curious waterfront still has a couple of secrets.

This museum devoted to the gothic author holds such interesting ephemera as his socks and walking stick.

A morbid secret lies hidden within the beautiful walls of the Boston Athenaeum.

A terrific purveyor of natural history objects and curios.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

A taxus-tree to which Julius Caesar reputedly tied his horse.