A hidden network of subterranean passageways lies tangled beneath Indianapolis' bustling City Market.

A 30-year-old Sycamore tree grown from a seed taken to the moon and back.

At the top of the hour, this steam-powered clock's eight brass whistles play "Back Home Again in Indiana."

This library and museum is dedicated to the life and literature of the Indianapolis native author.

A life-sized recreation of the megafauna that once roamed this region is a feature at the birthplace of American paleontology.

Rare and classic books by Black authors are the focus at this independent bookstore in a historic Atlanta neighborhood.

Mysterious ancient boulder carved with petroglyphs in the mountains of Western North Carolina.

This overlooked gem outside Niagara Falls preserves and celebrates Iroquois culture.

The oldest landmark of Toronto is a testament to shifting sands.

A book collector's dream, this Toronto bookstore has the world's first "Biblio-Mat," a random book vending machine.

The remains of the oldest bone-headed dinosaur in North America.

Canada's largest dinosaur skeleton was hidden away in storage for more than 40 years.

One of Canada's most incredible rare book collections holds hundreds of thousands of gorgeous tomes that the general public can touch.

The giant birds honor two native North American species.

A unique collection of Science Fiction, Fantasy, and everything in-between.

Spectacular views await visitors to this lake.

With over 340,000 artifacts and counting, there is something for everyone, often called the "Smithsonian of the West."

These free-roaming horses were once destined to disappear from the land.

A public center dedicated to showcasing and conserving the enormous shaggy Poitou donkey.

The world's first fully-fenced urban ecosanctuary is a haven for New Zealand's rare and endangered species.

Along a coast that sees the annual migration of humpback whales, a geological formation that takes the shape of a whale’s tail.

Dine inside a giant caterpillar at this community-run eatery.

This Costa Rican topiary park is a surreal garden of unearthly delights.

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