Touching this little fossil embedded in the wall of a grand mosque-cathedral may make your wishes come true.

This architectural oddity is an oasis of green on the outskirts of Valencia.

Spain's largest bullring offers a unique glimpse at architecture and history.

Hidden behind a wall, Spanish nuns distribute their signature sweets on a revolving tray.

The tomb of one of Scotland's bloody historic villains is a magnet for bumbling desecrators.

The taxidermy remains of the first mammal ever cloned from an adult cell are on display in Edinburgh.

This allegedly haunted 16th-century tower house-turned-museum exhibits thousands of spectacular objects.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

A labyrinthine network of chambers with a storied past hides below Edinburgh's South Bridge.

A sweet symbol marks the place where torturous executions were once carried out.

A 18th century graveyard and its astonishing cortege of macabre iconography.

The fountain marks the area where hundreds of accused witches were burned at the stake.

An artsy hidden staircase leads to breathtaking views of San Francisco.

A psychedelic labyrinth on the San Francisco bay.

London's most popular recording studio, located in the capital's East End, runs partly on solar power and has played host to some of the world's biggest acts.

The sumptuous ceiling was one of the last things Charles I saw before his execution.

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

Traveling collection of amazing automata.

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

A boutique perfumery fashioned to look like a Victorian-era shop.

The John Snow Memorial marks the epicenter of London's 1854 cholera epidemic.

A musical composition 1000 years in length plays at the Trinity Buoy Wharf in London.

An artistic tribute to the famous singer, just around the corner from where he was born.

A memorial to a dog that inspired rioting in the streets of London.