This super steep hike ascends 2,000 feet in less than a mile.

One woman's UFO-themed campground, complete with self-built energy vortexes, UFO-themed weddings, and magic bushes.

The largest self-built castle in the U.S., six decades in the making.

Officially named the "Loneliest Road in America," this barren stretch of Nevada road offers almost nothing but sky and open fields.

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

Dyed by iron oxide over centuries, these sandstone rocks rise thousands of feet into the sky.

The atmospheric road was never meant to be so creepy.

A Hawaiian stairway to heaven—that you can't climb.

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

Surreal riveted sea forts once protected the Kent shores from German attack.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

Train tunnel running underneath Quebec City.

A unique sculpture park that specializes in the huge and bizarre.

Erected in 1697 this Philadelphia bridge is the oldest surviving roadway bridge and perhaps the oldest stone bridge in the United States.

Breathtakingly blue walls shimmer inside the "Glacier Behind the Town."

Scattered throughout London are ancient remnants of the city's former bounding wall.

The quaint little store that is said to have inspired a famous Dickens novel was only given its name after the book was released.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

Banksy gives themself artistic license with this piece of London street art.

A student driver's nightmare.

A historic London cemetery now serves as a nature park incorporating gravestones & memorial statues.

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.

An unusual round church in London with a Templar past.