The "World's Largest Underground Business Complex," a 55,000,000-square-foot city underneath Missouri.

Dublin's "Dead Zoo" serves as a window to Victorian museum design.

This permanent collection of preserved bodies taken from Irish bogs is one of the leading authorities on such morbid mummies.

A century-old tradition has culminated in a small but singular collection of feline effigies.

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

Protecting the dead from opportunistic body snatchers.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

The final resting place of soldiers' loyal canine companions.

A six-ton wedding present for the King of the Scots.

The most loyal of little dogs, or a Victorian era publicity stunt?

High Victorian fantasy created a fairytale castle out of a ruined fortress in Wales.

Recently restored menagerie of Victorian-era beasts.

Decrepit Victorian public lift is a white-knuckle ride.

One of the few standing Roman lighthouses and a labyrinth of tunnels are a couple of the secrets at this historic castle.

An experimental, automotive replica of Stonehenge.

This hot dog-shaped diner has moved all around Colorado, never been to New York.

Community bookshelf of 25-foot-tall book spines.

Four, 18-foot-tall badminton shuttlecocks lie scattered about the lawn of a Kansas City museum.

Home of mutant livestock.

The highest bridge in America was built for an almost unnervingly small amount of money.

A bizarre house filled with an astounding array of collections.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.