A propulsion engine testbed that paved the way for the Space Shuttle launch sits without recognition at this rocket center.

The famed architect designed this Minnesota gas station of the future with a lookout tower.

A sculptor's dream castle turned fantastical ruin.

Eclectic musical collection ranging from hurdy gurdies and orphicas to the Rolling Stones Mobile Studio.

The largest guitar store in the world has been visited by some of music's all-time greats passing through upstate New York.

Scotland's oldest purpose-built concert hall houses an incredible collection of ornate, centuries-old keyboards.

A museum dedicated to the legacy of Bob Moog and his pioneering synthesizers.

Come for the pizza, stay for a performance on the world's largest theater pipe organ.

This small, but long-running hobby club has built one of the largest model rail lines in the US.

One of the largest pieces of scientific equipment ever carried on a NASA space shuttle sits in a Chicago alley.

This quaint museum lets you take a ride on its antique carousels.

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

A beloved, quirky little fountain featuring a large frog spitting water at a naked boy.

Easter in Westminster may be the only time and place to behold Edgar Allen Poe made entirely of Marshmallow Peeps.

There's more contention than one might expect from cherry pie pans.

This small museum concentrates on the juicy history of orange production in Florida.

Nikola Tesla's former home contains an homage hidden from plain sight.

This neon blue river gets its color from a unique mix of bacteria and volcano minerals.

Sloth rehabilitation center in the jungle of Costa Rica.

This free, take-a-book shop seems like a trick but isn't.

A century-old network of freight tunnels underneath the city's historic business district.

Three abandoned missile silos are hiding in plain sight behind a suburban development in Maryland.

Two dozen pinball games hidden away inside a most unlikely location.

Once the supplier for noteworthy projects like the National Cathedral, this old brickworks now lies abandoned.