In the middle of an extremely unforgiving and desolate high desert is the most secret military facility in the world.

An exotic wildlife habitat right off The Strip.

A collection of haunted objects and macabre oddities under one roof.

The second-largest gold nugget in existence, displayed in a Las Vegas casino conveniently named the Golden Nugget.

The bullet-riddled wall from the St. Valentine's Day Massacre, bloodstains enhanced for your viewing pleasure.

Las Vegas's very own 40-foot-tall fire-spewing praying mantis.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

Every president in history is immortalized in bronze in downtown Rapid City.

South Dakota's oldest operating brewery is housed inside a historic firehouse.

Breathtaking and huge 430 year old maps of Italy.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

The floor of this spectacular Baroque sanctuary is covered in memento mori.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

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

Eighty million natural history specimens call this gargantuan museum home.

This marine reptile was discovered by one of the 19th century's greatest fossil hunters.

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

The bones of two medieval royal lions were discovered at the historic fortress.

The beloved beast's taxidermy remains sit in the Natural History Museum's cafe.

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

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

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

A local museum honors the overlooked discoveries of Mary Anning, one of the first professional fossil hunters.

Two stone columns flank the grand Venice square, but there were supposed to be three.