The world's toughest modern Christian pilgrimage leads directly to the gates of Hell.

A communal oasis on Lake Zurich.

One woman's dream became a train hotel in her backyard.

House of vintage taxidermy and Steampunk sculptures in a quiet Pittsburgh neighborhood.

The universally beloved children's television figure is interred on a high hilltop in one of western Pennsylvania's oldest cemeteries.

This encrypted monolith protected a secret of Norse mythology by hiding in a church wall for over a millennium.

This pyramid in southern Sweden houses the remains of an eccentric nobleman, who spent his life doing whatever he felt like doing.

A church that bred legends, and served as an inspiration for the Da Vinci Code.

This series of Scottish caves has no clear purpose other than baffling historians.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

Protecting the dead from opportunistic body snatchers.

The tomb of one of Scotland's bloody historic villains is a magnet for bumbling desecrators.

One of the world's southernmost bars.

Complex aquaponics systems allow fish and plants to grow in harmony.

The arboretum whose marshy soil sucked up the dreams of housing developers.

One of Frank Lloyd Wright's final works was this UFO church.

Paranormal activity on the great lakes.

More than 5,000 contemporary and "historic" mustards from around the world.

Amateur taxidermy museum known for its large collection of white squirrels.

A bronze plaque marks the site of the only show the "King of the Soul Singers" ever missed.

Hidden away in the city of Madison, Wisconsin is a nearly forgotten home that Frank Lloyd Wright built for a childhood friend.

"World's largest scrap metal sculpture" stands in an outdoor sculpture garden in the middle of Wisconsin.

A bedazzled house and crown "jewel" of outsider artist Loy Allen Bowlin.

A museum celebrating the self-taught artist-environment builder.