This Seattle curio shop collects and sells haunted items in order to spread wonder one grim artifact at a time.

Seattle’s Whimsical Mural Master.

If you can look past the nearby sewer pipes, this urban sinkhole grotto is a mini-paradise.

This monument on Breed's Hill proves that one of the most famous battles of the Revolutionary War is misnamed.

A 50-year old dive bar that has its own yacht club.

This Cold War siren is one off the last of its kind still standing with its immensely powerful original horn.

The haunted reputation of these abandoned Colorado train tunnels is probably not helped by the terrifying spiked fence.

A rotting tree in the middle of Seattle doubles as an elaborately-controlled art piece.

Go inside to really appreciate this 500-year-old technological masterpiece.

This playground sculpture of an icon from the past is dedicated to the children of the future.

One of the indelible moments of the American Revolution took place at this location.

Hidden beneath the famous St. Peter's Basilica is a veritable city of the dead that may hold the remains of St. Peter himself.

Train debris from the deadliest avalanche in United States history can still be found in the ravine where so many perished.

Few other hotels can rival the grandeur of the Castle in the Rockies.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

The only road through the heart of Glacier National Park.

Milan's duomo is covered in beautiful carving including a curious "dinosaur-like" beast.

Elevated freight railway turned wildly successful urban park.

The largest wooden building in the world now houses a fascinating collection of aircraft.

This strange bovine gargoyle is said to have been put in as a passive aggressive form of revenge.

A walk through the historic city center, under the streets of Seattle.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

The final resting place of one of the most sensational guitar players of all time was created only after his father got the rights to his music.

A centuries-old church stands as a testament to Boston's "father of architecture."