A giant concrete orb in far north Iceland marks the ever-shifting boundary.

A home built with marble tombstones from the graves of 2,200 Union soldiers buried in a Virginia cemetery.

This romantic, decaying 13th-century ruin on the edge of Sherwood Forest is reputedly one of England's most haunted places.

This isolated structure beckons adventurers with sublime views of the Faroe Islands.

This haunted hotel built on natural springs once served as a hospital for a quack doctor promising a cure for cancer.

Structure built from the skulls of vanquished foes.

The most southerly spot on New Zealand's South Island is home to surreally shaped, permanently mangled trees.

The skeletal white beams stand as a monument to religious dissent.

The excellent acoustics of this natural amphitheater made it a popular preaching spot for the founder of the Methodist Church.

A cramped wooden attic that once housed one of the world's first movie studios.

A stunning two-story timepiece within a medieval Brick Gothic church.

What's that on the side of that building? Va Va Voom, it's Bettie!

This golfball sized platinum iridium cylinder is the official starting point for all national weight calibrations

The winding route passes through an enclosed alleyway, two tunnels, and leads to the White House basement.

A perfect replica of the beloved show's first set.

A remote candy-striped mountain in the Peruvian Andes straight out of the pages of Dr. Seuss.

A white oak with property rights.

This picturesque archeological site looks like it was pulled straight from a fantasy novel.

Eight naturally mummified bodies in glass coffins are housed in an underground crypt.

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

The oldest operating cemetery in Denver is the eternal home of some of the Centennial State's most famous residents.

This Chinese-style quartz sundial was saved in its final hour.

A technicolor place of worship for Elevationists.

This museum offers an actual time machine back through Colorado's past.