Go inside to really appreciate this 500-year-old technological masterpiece.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

In its day this historic fort held 100 cannons pointed in almost every direction to protect New York.

The New York hotel where tragic visionary Nikola Tesla spent his final hours, destitute and alone but for the pigeons.

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

Avoid gangster interaction while window-shopping.

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

Lie in a hammock where George Washington stood.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

Slyly buy a shake in the Parker Meridien lobby.

The "Seinfeld" diner.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

One of only two commuter aerial tramways in the United States.

More gold than anywhere else, ever.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

Elevated freight railway turned wildly successful urban park.

A crumbling hospital from the 1850s on Roosevelt Island.

The John Snow Memorial marks the epicenter of London's 1854 cholera epidemic.

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

The Tudor-style cottage in the middle of the square is not quite what it seems.

Black cat statues guard this temple-like Egyptian revival factory.

This intricately carved and hilariously huge bed was such a famous symbol both Shakespeare and Byron used it in their writing.

The wooden telephone box hidden away in London's Piccadilly was the original prototype of the iconic kiosk.