The Boston square dedicated to the dark poet who was born nearby.

An enormous, inside-out glass globe built in 1935.

This small shop walked so America could run on Dunkin'.

The world's oldest and largest museum of mass transit vehicles.

Turns out you can see the world without ever leaving Maine.

The most photographed house in Maine looks good enough to eat.

They call buildings like this "mimetic architecture," but nothing has ever mimicked the taste of Moxie.

This candy-striped tower is the farthest east you can go in the United States.

The largest tidal whirlpool in the Western Hemisphere.

The world's largest rotating world.

Before he was America’s most famous preservationist, John Muir was an ingenious mechanical inventor.

Literally a million fascinating cartographic artifacts are held in this sprawling university collection.

The center of the only hemisphere that awards visitors with a commemorative coin.

This 1960s kinetic artwork has been restored and is once again whirling away in downtown Minneapolis.

The only arched bridge made of stone on the entire Mississippi River.

This bright yellow building is packed with sweet treats from all around the world, from chocolate-covered crickets to whoopie pies.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

A toweringly silly piece of modern art has been delighting locals since the 1980s.

This tiny patch of arid sand sits in one of the greenest states in the United States.

An 18th-century home taken over by antique automatons and musical machines (Closed).

This 1,700-pound edible sculpture is way better than your average chocolate mousse.

A monument marks the beginning of the longest north-south road in the United States.