London's smallest police station is barely the size of a phone booth.

An alleyway plaque is all that remains of the independent Texas' envoy that forgot to pay their rent for over a century.

A student driver's nightmare.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

Hear the quietest sound from across the dome.

Banksy gives themself artistic license with this piece of London street art.

An unusual round church in London with a Templar past.

This South London cemetery holds the remains of more than 15,000 people.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

This forgotten boat elevator was an engineering marvel in its heyday.

This lovely pocket park is one of the most under appreciated in D.C.

A tiny monument to the unsuccessful attempt by Thomas Jefferson to place the prime meridian in Washington.

Before Nixon, "watergate" meant canals.

An obscure public service from the U.S. government that redeems burnt, moldy, and soiled old greenbacks.

A super-sized promotional trick that is now a D.C. landmark.

A cavernous three-story, 43,800-square-foot basement that was forgotten about for 60 years.

A historic neighborhood church is reborn as a psychedelic arts collective.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

The United States Capitol's former columns still stand.