Amidst towering office buildings, a local pub lives inside Sheffield’s oldest surviving domestic building.

One of the last remnants of the Bessemer process that revolutionized steel production during the industrial age.

An enormous steel waterfall is a nod to the substance that shaped Britain's Steel City.

This sculpture encompasses the emotion of rail travel.

Since 1887, this old-school shop has stacked its shelves with extraordinary coffees and teas.

The Tudor-style cottage in the middle of the square is not quite what it seems.

This third-generation institution is one of the last in London that still cures its own salt beef for epic sandwiches.

Catacombs turned marketplace.

This sprawling, Brutalist estate feels like a city within a city.

Order a salt beef-loaded beigel at any hour of the day or night at this East End institution.

These 19th-century gas tanks were remade into an apartment complex.

Where the legendary wizard sleeps for eternity, according to Arthurian lore.

This former “ante-chamber to the guillotine” has been refurbished to illustrate the brutal history of French justice.

A traditional U-Bahn station in Berlin gets a string of rather untraditional benches.

A 14th century bridge built as a fortress, where the devil lurks on one of its towers.

The evocative ruins of a medieval village.

The world's most famous cheese caves.

The world's tallest bridge is also possibly the most elegant.

France's highest manned weather station is the only one still inhabited by meteorologists.

This army of concretions is an unexplained geological phenomenon unlike anything else in the world.

A chapel on a volcanic core, marking the end of a successful journey.

This volcanic crater lake is renowned for its perfectly round shape, stunning blue-green waters, and unique geological properties.

This medieval village clings to a cliff in southwestern France.

This macabre masterpiece of a mural is one of Francisco Goya's "Black Paintings."