The Vatican's secret porn-festooned bathroom was painted in erotic murals by one of the greatest artists of the Renaissance.

Breathtaking and huge 430 year old maps of Italy.

European castle ruins in an American state park are actually the product of death and grief.

This black sand beach was crafted from volcanic explosions including the historic Minoan eruption.

A Bronze age settlement on the Greek island of Santorini might have been the inspiration for Plato's Atlantis.

These ancient ruins hide in plain sight next to a dessert shop.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

Legend says this sacred tree was a gift from goddess Athena.

This industrial area was the dumping ground for massive amounts of trash, some of which washes up as tiny bits of sea glass.

There’s a hidden military meme engraved on the World War II Memorial.

A cavernous three-story, 43,800-square-foot basement that was forgotten about for 60 years.

Look closely and you’ll notice that the color changes a third of the way up the tower.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

Nature's biggest mammal swims in landlocked Oklahoma.

These massive mitts are made of 30 tons of devotional bronze.

A Route 66 filling station that was designed to resemble the Hagia Sophia, and is now the symbol of an arts district.

A half-size replica of the World Trade Center towers above Tulsa.

An acoustic anomaly with a mysterious cause.

Sid Vicious famously punched a hole in the wall of this iconic music venue.

This former luxury resort in Kaua'i is now an abandoned relic.

Submerged lava formations create incredible waterworks.

This blowhole is supposedly caused by a trapped monster.