The last of Philadelphia's wood-paved streets is now a landmark of terrible engineering.

Instruments, apparatus, and rare books all relating to chemistry and its related sciences.

Yo, Adrian!

One artist's love letter to his city and its citizens plays out across dozens of bright murals painted on the sides of decrepit buildings.

A layered tribute to the work of mosaicist Isaiah Zagar.

Detailed facade of a brownstone in Boerum Hill.

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

Slyly buy a shake in the Parker Meridien lobby.

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

A popular European tradition makes its way to the states on one of America's most famous bridges.

Tucked away amidst some of the most famous addresses in the world is New York's only fraction of a street.

Behind a bodega is a small museum of relics and ephemera showcasing the history of New York.

The final resting place of the great escape artist, where some still gather to wait for his escape from death.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

Try not to get slimed in Tribeca.

The mirrored section takes the shape of Hebrew characters when viewed from above.

This large copper bolt represents the benchmark for measuring sea levels in most of Europe.

Europe's official "zero-level," the equator of elevation.

Tucked in the back of a flower shop, its collection details the fascinating history of the Netherlands's iconic symbol.

Residents of Berlin take their coffee and cake in one of the city’s most restful spaces: a cemetery.

One of Amsterdam's narrowest houses is located right across the canal from its widest.

This museum housed in a former brothel explores the past and present of sex work in Amsterdam.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

A fascinating insight into daily life in the Eastern Bloc.