Hundreds of personalized inscribed planks make up this historic boardwalk.

A small part of lower Manhattan is actually made from a bit of England.

Commemorating the spot where the famous scientist fed his pigeons.

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

This monument to a veteran of the Mexican-American War is one of only two in Manhattan that serve as an actual mausoleum.

A 19th-century politician who died after walking home in a blizzard is honored with this Manhattan statue.

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

An homage to Jackie Gleason's bus-driving character from 'The Honeymooners.'

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

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

If it hadn't been caught in time, a flaw in the design of this Manhattan skyscraper could have led to its collapse.

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

Read a book next to a Midtown waterfall.

A miniature rainforest is growing inside of a Midtown Manhattan office building.

Spinning silently in the lobby of an Art Deco masterwork is a massive vintage model of the Earth.

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

The 28-foot granite map plots the locations of 40 theaters in New York City.

Amid the marketing blitz of modern Times Square is an elegant holdover from its showbiz glory days.

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

A stunning Victorian abbey and walled garden on a lakefront.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

The 2,000-year-old Roman columns are hidden within Barcelona's Gothic Quarter.

The oldest giants in Catalonia are now displayed in a 14th-century Gothic church.

This home designed for chocolate magnate Antoni Amatller is an exquisite treasure-box of Catalan Modernism.