A cylinder monument with a spectacular vista commemorates a friendship that some say never existed.

Visit a prison tower used during witch tribunals.

The gravestone of a famous poet features a fittingly poetic epitaph chosen by the writer himself.

Hundreds of tree trunks and Welwitschia flowers populate this living fossil haven.

The housing complex served as an anti-fascist fortress during the Austrian Civil War.

This series of Baroque passageways in Vienna's cultural center mix old architecture with modern art.

As can be expected from a centuries-old church built in a canal city, the undercroft of this house of worship is beautifully flooded.

One of the world's longest murals depicts the history of diversity in Los Angeles.

After starting as a whimsical tourist attraction that eventually found its way to ruin, these renovated canals offer a lush and exotic locale on the Pacific Coast.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

This medieval tower is all that remains of the castle where Joan of Arc was held before being burned at the stake.

This statue of one of the engineers who created the London Underground hides a ventilation shaft for the tube lines that run under the street.

At the center of London’s oldest roundabout stands an obelisk that was erected in 1771, but spent several decades elsewhere.

With a history stretching back to the 16th century, this pub has a few stories to tell.

Despite the name, this ancient piece of crystal may not have been a lens at all.

This inn of the court provides a fascinating window into London’s legal and architectural history.

An ornate and disused early 20th-century building has been given new life as a fully operational structure, complete with offices, oyster bar, and a furniture retailer.

This intriguing Bronze Age artifact spent centuries hidden within a Welsh faerie hill.

An eccentric Victorian aristocrat's enormous collection of medieval armor and weapons from around the world.

This Underground station has been a popular filming location for decades, even before it closed.

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

The handiwork of a underdog clockmaker who solved an impossible problem for an Empire, and forever revolutionized seafaring.

This mysterious and unique painting is filled with symbolism.

A mysterious shape catches the eye in this 16th-century painting.