Rippling sand dunes frozen in the Arizona rock.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

Pilgrimage site for star-crossed lovers.

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

A sunken idol welcomes parishioners to Davy Jones' Locker.

The celebrated eyesore created by starry-eyed sweethearts.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

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

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

The yawning maw of this pagan visage is said to bite off the hands of liars.

Costa Rican accommodation resembles a crash site, but with a nice balcony.

Sparkling, calcite-covered skeletons of children who may have been sacrificed to appease an angry god.

A massive underwater sinkhole made famous by Jacques Cousteau.

Native American burial mounds? Giant gopher dens? No one knows what created the Mima Mounds.

This historic Victorian hotel has a scandalous history of affairs and murder.

This famous bridge twisted itself into oblivion, but not for the reason you might think.

The highest point in Washington state is a volcano covered in glaciers.

Allowing humans and fish alike to migrate from freshwater to saltwater and back again.

Always a new use for this old building.

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

Tasked with beautifying a disused stretch of industrial land one artist filled a hole with grass.

A museum dedicated to the history and exploration of both popular music and science fiction.

A wall of chewing gum moonlights as collective art.

A 100-year-old purveyor of curiosities, curios, and kitsch featuring mummies, shrunken heads, and a Fiji Mermaid.