Forever immortalized in concrete, this Simpsons etching was crafted by show creator Matt Groening.

Beyond being incredibly fun, not much can be said about the Hole with certitude.

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

This Portland shop is brimming with natural wonders, local art, and handmade goods fashioned from recycled materials.

Las Vegas's very own 40-foot-tall fire-spewing praying mantis.

The second-largest gold nugget in existence, displayed in a Las Vegas casino conveniently named the Golden Nugget.

James Turrell's total color immersion art installation, hidden on the top floor of a luxury handbag shop.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

One of the world's tallest Ferris wheels takes visitors high above Las Vegas in a spinning party room.

This institution collects the history of burlesque dancing with a titillating collection of ephemera and pasties.

The largest greenhouse in the world is home to over one million types of plants.

Hidden in a grotto 26 feet below Nottingham's oldest hotel, this stylish subterranean drinking den is notoriously hard to find.

London's smallest police station is barely the size of a phone booth.

An unusual round church in London with a Templar past.

This South London cemetery holds the remains of more than 15,000 people.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

Home of Jake the Alligator Man, the mummified remains of a cigar smoking, cross-dressing celebrity of the Northwestern coast.

A Roman-style column in Oregon hides a spiral staircase inside.

A delightfully quirky blend of oddities spread throughout an old 1920s bank.

Oregon's unexpected high desert, displaying layers of time in a colorful show.

The seamy, underground secrets of Portland's criminal past.