This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

This once-derelict building is now one of the most beautiful bookstores in the world.

The fairy tale castle of the "fairy-tale king."

Aged nearly 1,700 years, the world's oldest bottle of wine is probably still drinkable.

A serious museum dedicated to two German comedians.

A fearsome dragon clings to a corner of Munich's city hall.

One man's personal kunstkammer, museum and shop.

The footprint of a frustrated devil in Munich's Cathedral.

The legendary luxury train passage is commemorated with a charming museum inside its former eastern terminus.

The pockmarks across the building's facade are remnants of the Blitz.

This hospital helped pave the way for treatment that drove down child-mortality rates in 19th and 20th centuries.

A tiny replica of the iconic London landmark hides on the side of the steel structure.

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

This one has sailed five times as far as Sir Francis Drake's famous ship.

A little slice of Japan and its aesthetics in London's Holland Park.

Bronze sculpture celebrating the relationship between Churchill and Roosevelt.

This hidden green space is the city's second largest conservatory.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.