Once the overnight home of Mary Queen of Scots.

Stone monkeys adorn the buildings of this former estate.

A magnificent tomb that was the final resting place of the Dukes of Hamilton.

One of Mexico's least-visited archaeological sites is tucked away inside a theme park.

A small collection of iguana-infested ruins hides amid Cancún's bustling hotel zone.

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

The Great Fire of London and the regulation of one-way streets both started in this alley.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

The barrel-made lookout from Shackleton's final ship is tucked away in the crypt of one of London's oldest churches.

Graffiti from the 16th and 17th centuries cover the walls of this part of the Tower of London.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

There's an exclusive Beefeaters pub hidden in the Tower of London.

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

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

These wire animal sculptures commemorate the exotic inhabitants that once called the Tower of London home.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

The 2,000-year-old beam is tucked within the pedestrian entrance to the old London Bridge.

The current seat of the Parliament of Andalusia was once the epicenter of the Great Plague of Seville.

This 17th-century pub once had a hole in its wall so the neighboring blacksmith could easily access beer.

This beautifully situated lakeside Roman settlement was likely built during the reign of the Emperor Hadrian.

A typographic tribute to the many comedic greats who make Great Britain laugh.

This striking monument pays tribute to those who died working the coal pits from the town of Cambuslang.

This replica medieval European village in the Dominican Republic was built by a Hollywood set designer.

Millions of glowing microscopic organisms light up the waters of this luminous lagoon.