This scale model of our solar system hid in plain sight for years before a physics team sought out all the planets.

An eclectic art form practiced by untrained masters is celebrated at this museum in the heart of Zagreb's old Upper Town.

Humble beginnings for one of the world's most famous scientists.

The remains of a sunken military ship wreck visible through clear water.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

One of the world's largest model railroads is a mind-boggling achievement.

Shop the world's largest number of ice cream flavors, ranging from delightful to downright bizarre.

This Croatian fairytale castle is slowly falling apart thanks to years of neglect.

Where the lovelorn find a home for their sentimental keepsakes.

"World's largest scrap metal sculpture" stands in an outdoor sculpture garden in the middle of Wisconsin.

This cave holds a surprisingly colorful variety of geological oddities.

This punny mirror of another Wisconsin attraction is exactly what it sounds like.

A huge resale shop for the cast-offs of the film & television industry.

Nondescript elevator doors open to reveal a stunning, surreal world.

Piano-making empire filled with 200-year-old steam machines still churning out 1,000 instruments a year.

450 dead and frozen fish, proudly on display in Japan.

A giant Troll lurks under one of Seattle's oldest bridges.

A wall of chewing gum moonlights as collective art.

An abandoned village that doubled as "The Hunger Games"' post-apocalyptic wasteland is up for grabs.

A psychological self-portrait in the form of a giant, segmented head.

One man's extraordinary topiary garden in a small South Carolina town.