A closed London rail station created to cart away the dead still bears the marks of attempts to make it less morbid.

One of the few remaining examples of 19th-century London’s attempt to clean up its reputation.

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

A network of bells in the pubs and restaurants around Westminster alerts politicians when it's time to cast their votes.

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

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

Look closely and you’ll notice that the color changes a third of the way up the tower.

A fantastic array of trays and cables once whisked books over to the Capitol at 600 feet per minute.

One of the largest artillery pieces in the world sits in a Washington D.C. parking lot.

Members of Congress have traveled between the buildings on Capitol Hill for a century hidden from tourists, press, and storm clouds.

The "lovely red Vega" of the legendary record-settling pilot.

Sit where JFK proposed to Jackie or where Nixon dined on meatloaf at this storied pub.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

A painfully obvious spy house sits right across the street from the Russian Embassy.

There's a 12-foot-tall replica of the Washington Monument hidden under a manhole nearby.

The façade of this building looks like a bingo board, but it's really a giant clock by a famed graphic designer.

This speakeasy continues the Prohibition-era legacy of Harlem's jazzy Swing Street.

This historic building housed the surviving crew members of the Titanic, who were left destitute after the wreck.

Historical figures from New York City's Catholic community reside in Midtown.

A discreet little stairway on St. Nicholas Avenue leads to a quaint and unexpected cobblestone street of 19th century wooden rowhouses.

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

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

Nikola Tesla's former home contains an homage hidden from plain sight.

The oldest surviving bridge in New York City, which reopened to pedestrians in 2015.