A small Chicago museum filled with thousands of preserved butterflies, beetles, and more.

A relic of the Cold War in Chicago.

A 19th-century horse lover's bequest led to the construction of this unique fountain in Chicago.

This titanic Catholic church in Chicago is also a refuge of the fictional cult-favorite wizard detective Harry Dresden.

This cheerfully-named branch of the Chicago River is the fetid result of years of blood, entrails, and meatpacking waste.

One-of-a-kind preserved ruins of an abandoned 1880s church in Chicago's Pilsen neighborhood.

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

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

Home to some of Indiana's last bison herds.

A set of tall pillars and alcove-like rooms that are significant to the Miami people of Indiana.

This bridge was constructed from the remains of the first Ferris wheel.

Lions and tigers and leopards, servals, pumas, bobcats, lynxes, and ocelots... oh my!

The site of a 19th century "dream city" that almost rivaled Chicago before being swallowed by the Indiana sand dunes.

A medical facility that has been kept frozen in time.

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