A clone-tree in Washington Square Park sprung from seeds that went to the Moon and back.

Ant sculptures march up the side of what used to be an iconic spot in punk rock lore.

A layered tribute to the work of mosaicist Isaiah Zagar.

America's first serial killer rests in anonymity.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

This little-known Revolutionary War fort is supposedly haunted by the ghosts of its past.

This local gem houses the largest collection of pre-Raphaelite paintings outside of the U.K.

A drab two-story office space in Delaware is a hidden tax haven for Hillary Clinton, Donald Trump, and over half the Fortune 500 companies.

This weeping, 10-foot-tall sculpture was a maquette for a 9/11 memorial.

Enchanting gardens surround a derelict mansion, all hidden in plain sight behind a stone wall.

This splendid Versailles-inspired mansion has the largest French-style formal gardens in North America.

This lighthouse was witness to the end of WWII hostilities and now collects creepy cairns.

This Rhode Island mansion was a stand-in for the exteriors of Collinwood in the original "Dark Shadows" series.

Three and a half miles of cliffs, rocky beaches, Gilded Age mansions and 40 Steps to nowhere in particular.

These gardens recreate unique and endangered Michigan habitats.

Its floors are marked by colorful cues depicting Michigan's native fauna.

These grassy undulations on a stretch of University of Michigan campus aren't bad landscaping, they're art.

An unlikely beach paradise of giant sand dunes lies between two lakes just a few minutes from Michigan's cherry country.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

World's largest Christmas store.

Trade in that pesky human soul for cold-hard circuits.

This national park on the shore of Lake Michigan features remarkable dunes that lie at the heart of a Chippewa legend.

Island where motor vehicles are banned -- home to the only carless highway in the United States.

This winding road of 318 curves is a must-visit for (careful) motorcycle and sports car enthusiasts.