A strange, heartwarming, decades-old declaration of love on a New Hampshire roadside.

These Pre-Columbian petroglyphs contain representations of birds, deer, hunters, and even some early Native flute players.

Make your reservation to have coffee with some kitties.

An ancient system of freshwater caves filled with animal bones, including that of species long-extinct.

Part modern art project, part traditional chapel, this see-through church is only substantial from the right angle.

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

This Maine bridge may be the last wire-supported bridge of its type in the world.

This Dutch-styled residential building was originally a cocoa company's World's Fair showpiece.

Once the future of underwater combat, this old sub is now open for visitors to muck around in.

There aren't too many operational funiculars around, but Pittsburgh has two!

Rent out a glass igloo to watch the Northern Lights like you live in the future.

A rock outcropping left by a glacier that made itself useful throughout the centuries.

These mysterious petroglyphs in Vermont reflect a troubled history in the treatment of Native American culture.

This historic mini-suspension bridge was swept away once but is now here to stay.

The oldest surviving wood-frame building in North America is still in the family.

Junkbots and mud babies are the masterpieces in this fantastically sci-fi art museum.

Go inside a revolutionary, cage-less zoo where 35 species live and some of them roam free alongside their human visitors.

A former zoo turned public park, where visitors can hang out in the old animal cages.

Industrial ruin decimated this tiny New England company town in a fashion no one saw coming… and even fewer remember today.

Homemade rockets, dinosaurs, and robots make this New York small business much more than a furniture store.

This magical museum celebrates the life and work of a seminal children's book writer (and occasional spy).

The house where Good Will Hunting was written is a surreal fairytale abode.

This folk art dinosaur was almost pushed to extinction due to lack of a building permit.

This Oregon farm is dedicated to teaching people the professional art of tree climbing.