A giant Troll lurks under one of Seattle's oldest bridges.

Make your reservation to have coffee with some kitties.

This painted blacktop brings the classic arcade game to life.

This former coal gasification plant found a curious second life as a popular public park.

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

An old vending machine serves up unpredictable beverages from its seemingly magical insides.

A "sinister, whimsical, tacky, and really orange" public art installation hidden under a Seattle bridge.

This unique Seattle structure was designed to be the greenest commercial building on the planet.

A beautiful final resting place for some of the noteworthy deceased.

Activists are fighting to preserve these unfinished highway ramps as a tribute to the citizen revolt that halted their construction decades ago.

This gold-winged spire celebrates the first true flight around the world.

A huge musical sculpture and other art installations on the National Oceanic and Atmospheric Administration grounds.

Old-fashioned knowledge and modern engineering create the world's only rotating boatlift.

The heads of two giant mythological water horses honor Scotland's horselord past.

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

The final resting place of soldiers' loyal canine companions.

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

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

Charles Babbage's proto-computer, painstakingly brought to life.

This innovative steam machine was no doubt the most famous of the pioneer locomotives.

Catacombs turned marketplace.

A subterranean ice warehouse that has lain hidden beneath central London for over a century is now open to the public.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.