The doodles of a genius line the walls of a secret room under the Medici Chapel, where they were hidden for nearly 500 years.

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

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 oldest operating pharmacy in the world features 800-year-old recipes.

The famous sculptor left his mark on this Italian wall in an internationally protected example of street art.

Over 50 exquisite hand-painted Renaissance maps decorate a Medici storage room.

The middle finger of modernity.

One of the last few places in Manhattan that employed a pneumatic systemic keeps it on display.

An annual extravaganza of Broadway theater memorabilia.

This curved Manhattan building was built to house the opulence of John D. Rockefeller's oil empire.

Come for the waffles, stay for more waffles.

Order scoops of pandan, lychee, and black sesame at this family-run institution.

Final resting place of the immigrant who brought artificial seltzer water to America.

“Invented in Key West, Perfected in Brooklyn."

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

NYC's legendary underground network for bovine transportation.

A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.

More gold than anywhere else, ever.