One of the steepest streets in the United States makes an intriguing challenge for cyclists.

This abandoned dream castle and its cemetery look out over the city that once inspired their creation.

A favorite of Amelia Earhart, ranking among those rare bridges that can be crossed without changing sides of the river.

The highest point in Indiana is curated by an Eagle scout but may be in danger of losing its record to a nearby garbage pile.

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

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

In an alley not far from where two great highways meet, byways of a very different sort are honored.

In a grove of fast growing walnut trees outside Paris, Illinois, a marker shares the story of a fictional road building culture.

One of the first historical sites of an alternative universe was installed in the town of Paris, Illinois—which is now home to an annual spelling bee of Kcymaerxthaereal words.

The world's largest collection of the world's largest objects is in one small Illinois town.

Known as the "Cross At The Crossroads," this massive metal cross is just short enough to avoid the FAA.

A walk through the historic city center, under the streets of Seattle.

A creepy sculpture of a decapitated head invites viewers to see St. Louis through its empty eyes.

A kitschy, creepy St. Louis mainstay.

The Old Courthouse takes visitors on a captivating trip through St. Louis' timeline.

An abandoned factory along the Mississippi coated by a giant mural.

A chessmaster's dream destination.

One of few surviving standpipe water towers in the U.S.

This is not your typical jungle gym.

What was meant to be a temporary exhibit is now a permanent fixture at the St. Louis Zoo filled with beautiful birds.

This titanic oil company sign is a reminder of the Americana boom of the 1970s and also its commoditization.

A late sculptor's last project was to turn this abandoned cement factory into a castle-themed amusement park.

University City's quirkiest resident lives in a park named after its first.

What was once a presidential estate is now an exotic menagerie and home to the Budweiser Clydesdales.