The oldest operating cemetery in Denver is the eternal home of some of the Centennial State's most famous residents.

An early Portuguese serial killer's head is alarmingly well preserved in a jar at the University of Lisbon.

'The Letters of Utrecht' lays out a ribbon of poetry one letter at a time, with no final verse in sight.

An Oxford museum where visitors can have tea with the Mad Hatter and climb through the wardrobe to a fantasy land.

The Slovenian architect designed many landmarks in the capital city, including his own dream house.

This crumbling Art Deco movie palace in Mexico City has been abandoned for two decades.

The site of the one of the most deadly train wrecks in American history.

There are plenty of wonderful panoramic vistas in Edinburgh, but not many are hidden smack in the middle of the Old Town.

These ornate manhole covers were used for a now-forgotten purpose.

The massive, incredibly rare instrument is over 11 feet tall with a range so deep it goes lower than humans can hear.

The modest childhood home where the baseball legend and Yankees star learned to hit from both sides of the plate.

A tribute to the "toughest woman on the Texas frontier," who survived a famous battle and five husbands.

The bridges portrayed on EU currency aren't fictional anymore.

This tiny 1930s Art Deco airport is a beautiful remnant of a bygone era.

The site of a mysterious pony massacre is rich with extraterrestrial conspiracy theories.

FIFA deemed this isolated field one of the most remarkable places to play the sport.

Curtiss is a forgotten figure in the early history of flight.

These naturally occurring but rare geological formations are each about the size of a small house.

A close look reveals that the Scottish monument is just slightly off-kilter.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

A rare opportunity to drive across the ocean floor.

New York City's first Modernist house.

A remote hilltop covered in giant monoliths haunts the Brittany countryside.

One of the world's largest automobile junkyards is a unique landscape of metal and moss.