There's something big lurking beneath the surface of this tiny Oregon park.

A small, fascinating fire museum hidden in plain sight in an administrative building.

All aboard the world's longest miniature railway.

A chance to sleep among the firs and pines of the Oregon forest.

A logging-themed roadside restaurant surrounded by museum-quality machinery and artifacts from the industry's heyday.

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

This modest post office sits on the site of H.H. Holmes' famous murder castle.

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

This historic hotel invented the chocolate brownie.

This $3 million model train takes you through Chicago, Seattle, and the thousands of miles in between.

This unauthorized stone mermaid was secretly carved out of public stone before being permanently preserved.

The site of the first couple's first kiss is commemorated by the most adorable presidential monument ever.

The world's only known button museum.

What's left of the ruins of the 1893 Columbian Exhibition, or World's Fair, also known as the White City.

A Museum of Holography frozen in 1974.

A giant bronze coil of feces is both a tribute to doggie defecation and a reminder to pick it up.

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

This whimsical Oz-themed park had a wonderful impact on the surrounding neighborhood.

A century-old tradition has culminated in a small but singular collection of feline effigies.

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

Giftshop catering to cryptozoologists and anyone with a sense of humor.

This whimsical stacked cabin looks like something out of a children's book.

Breathtakingly blue walls shimmer inside the "Glacier Behind the Town."

Home to the deepest rift anywhere on Earth.