Never actually a tree at all, this spot was the site of London's public hangings for nearly 600 years.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

This legendary stone is of unknown origin, and throughout history has been a literal touchstone for British leaders.

Rebuilt remains of a temple to Roman god Mithras.

This captivating Bronze Age timber circle spent centuries concealed by the tides.

This surreal art house looks like a geometric version of a small chapel.

This monstrous face has watched over passersby for centuries.

This striking steel sculpture transforms environmental data into art.

A remarkable medieval structure born from a 14th-century disaster.

Terrifying derelict military hospital once housed a recuperating Hitler.

A former Oz-themed attraction that has fallen into disrepair, but still holds some of the original magic.

A 17th-century bezoar, dirt from an infamous site, and other curios decorate this unusual bar.

Divinely-inspired village houses 6,000 dolls, plus strange and lovely outsider art.

A curious collection of oddities including a lock of Alexander Hamilton's hair and Harry Houdini's ouija board.

Bigfoot prints, Feejee mermaids, and haunted dolls on display in a tiny North Carolina town.

A small flooded ghost town with a few scattered structures remaining.

An absolutely beautiful 200-foot stained glass installation traces the evolution of knowledge.

A desert settlement founded and later abandoned by Hawaiian members of the Church of Jesus Christ of Latter-day Saints in Utah's Skull Valley.

This geothermal hot spring hides beneath a slowly growing mineral dome.

This plaque marks the site where the penultimate chapter in the journey of two doomed boys unfolded in an imagined parallel universe.

What's a diner from the 1939 World's Fair doing in a remote Utah mountain town?

Incredible sculptures inspired by obscure passages from the Bible.

This massive metal sculpture in the shape of a folded paper airplane overlooks a Utah mountain.

Water flowed out of the town's unusual tree stump fountain in the 1930s, and the well still runs today.