With 3,000 bikes on display, the world's largest bicycle museum includes some famous rarities.

One Pittsburgh musician's decades-in-the-making memorabilia collection is on display at this rock-n-roll curio shop.

Rummage through this sunken ship, but leave your scuba gear at home.

Prove you deserve to be fed by Kenny Shopsin.

The statue honors a beloved bird that once roamed St. George's Market.

There must be a pun in this haystack somewhere...

The site of the deadly Triangle Shirtwaist Factory Fire.

With 8,000 pipes this giant instrument is the most versatile theatre pipe organ ever built.

The subterranean "lake" below the Paris opera house inspired the Phantom of the Opera's lair.

An annual extravaganza of Broadway theater memorabilia.

A swirling spectrum of stained glass dazzles visitors who enter this subway station.

Plot your trip through the city on the sidewalk.

The 28-foot granite map plots the locations of 40 theaters in New York City.

Visit the WWII bunker where the British won the battle for the skies.

Breathtaking and huge 430 year old maps of Italy.

A petroglyph map of the upper Snake River carved by prehistoric hunter-gatherers.

A Cold War secret surveillance tower used to spy on radio communications.

A subterranean display of public art and architecture.

This 15th-century Serbian Orthodox monastery also contained a school for illuminating manuscripts.

This Underground station has been a popular filming location for decades, even before it closed.

An abandoned train station in Munich constructed for the 1972 Olympic games.

The prototype for all Nazi concentration camps.

When a medieval fire claimed the original St. Stephen’s Cathedral, it sparked a pattern of unquenchable organ building.

All that's left of the quintessential "cabin in the woods."