With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.

This striking public art installation is suspended above a public park, designed to gently move in the breeze.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

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

Elevated freight railway turned wildly successful urban park.

10,000 flowered plants bloom in the City of Roses.

These old stone ruins in the Oregon wilderness were once bathrooms and are steeped in legends of murder.

A geological mystery on Camelback Mountain.

The unusual burial monument of Arizona's first governor.

In one Chicago park, a trio of werewolves are waiting to devour their fallen brethren.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

Once at the center of U.S. finance, the historic Trading Room was meticulously recreated piece by piece and rebuilt in the Art Institute.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

Each of these gorgeous, intricately decorated rooms is painstakingly crafted to the scale of 1 inch: 1 foot.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

A giant chess set, minus the psychedelic drug trip.

An extensive collection of ancient Egyptian artifacts and mummies.

The largest permanent Monopoly board makes one of the longest games even bigger.

Once the tallest building in the world and the site of "the highest dinner ever held in New York" this building now holds the most expensive penthouse in the city.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

This sandstone mansion was the home of two of Oregon's most important pioneers.

An old-timey peepshow allows visitors to gawk at some of the world's most freakishly large footwear.

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

A wall of chewing gum moonlights as collective art.