Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

Commonly acknowledged as the only public monument to the Devil himself.

This lucky bronze frog was gifted to Madrid by a casino.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

The earliest known map to show America, discovered by accident at a Paris bookshop.

This little sun pays homage to a massive gate that once stood at this location.

A must for film lovers in Madrid and home to the Spanish Film Library's projection space.

The rotting skeleton of a shoreside fun fair that was destroyed by fire and storms still haunts the Brighton ocean view.

The oldest residential street in Europe also features an optical illusion.

This enormous "cloth of the conquest" depicts the Norman invasion of England in mind-blowing detail.

When the plague struck York, this stone was used to leave supplies for the sick.

A Reformation-era fiery figurehead once denoted this location as a print shop.

Follow the original medieval paths that wind through this intriguing section of the city.

This Sheffield sculpture composed of 17,000 Allen keys honors both urban falcons and a furniture icon.

Alongside its 16th- and 17th-century architecture and interiors, this mansion houses an Ancient Roman ring that some believe may have inspired J.R.R. Tolkien.

This striking observation tower shaped like a spinnaker sail is the newest icon in historic Portsmouth.

The door of St. Lawrence’s Church features small scars from a battle that took place nearly 400 years ago.

This cathedral's stained-glass patchwork of psychedelic colors and shapes was put in place long before the swinging 60s.

The tallest church in Mechelen might have been the tallest in the world if not for a lack of funds.

Banished from town, this local jester concocted a clever return.

A giant bug impaled on a 75-foot-tall needle.

The Belgian library displays burned books that were salvaged from the fires of both world wars.

This whimsical statue dumps water on its head to symbolize knowledge flowing into his brain. Or maybe booze.

Museum dedicated to "the man who moved the Earth."