Now abandoned, the first public health hospital in the U.S. saw more than one million immigrants from around the world.

Currently housing a corporate bank branch this building at the southern tip of Manhattan was once the gateway to luxury vacationing.

Built hundreds of years ago this downtown iron barrier once protected a much despised king.

Perhaps the most storied New York City eatery, Delmonico’s reshaped American restaurants.

Possible relics of the ancient Roman city are hidden in this restaurant's façade.

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

After traveling the world, one of the last remaining fully-rigged three masted iron-hulled cargo ship in the world found its home in New York.

Elevated freight railway turned wildly successful urban park.

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

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

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

Striking, enormous gold-plated sculpture of Buddha installed in the 19th century.

This subterranean oyster house has been the pearl of Grand Central Station since 1913.

This group of sculptures includes the first statue of a female politician in London.

A configuration of a trio of statues that depict a scene reflecting a time emblematic in the city’s rich history.

Nepal's unclimbable sacred peak.

The world’s second-largest flood defense barrier has protected London for decades.

First road tunnel in England.

Art Deco and “Wrenaissance” mash-up, this recently restored royal residence has been home to kings and comes with secret monkey passages included.

A monolithic monument in Greater London.

This artificial lake surrounded by Brutalist architecture served as a stand-in for futuristic Britain in Stanley Kubrick's 'A Clockwork Orange.'

Though it's not the largest, this one-kilometer outdoor market is reportedly the longest in Europe.

These enormous concrete blocks played a vital role in one of history's most important days.

One of the oldest seagoing boats in the world can be found at the Dover Museum.