The world's largest anatomically accurate brain sculpture.

Famously misunderstood wonder of the ancient world

This high point in the Great Smoky Mountains is said to be home to the chief of all bears.

An old-timey peepshow allows visitors to gawk at some of the world's most freakishly large footwear.

A wall of chewing gum moonlights as collective art.

The uniquely-designed winter home and sculpture studio of Anna and Archer Huntington.

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

This open air cathedral invites all faiths to worship under the only roof big enough to fit them all: the sky.

I-95's Tijuana-style celebration of kitsch at the Carolina border.

Giant six-pack could provide one person a six-pack a day for 3,351 years.

Hear the quietest sound from across the dome.

Created by one of England's most prolific labyrinth designers, inspired by Bath city history.

The world's longest outdoor covered escalator system transports commuters through Hong Kong's hilly terrain.

San Francisco's newly reopened hands-on science museum.

One man's extraordinary topiary garden in a small South Carolina town.

As its grandiose name implies, this wooden dome is unsurpassed in size.

A turn-of-the-century architectural marvel built on healing mineral springs and salt licks.

A flamboyantly decorated bridge signals diversity and fellowship at the entry to Indianapolis' Broad Ripple Village.

A large circus museum with summer performances.

Less a museum than a bizarre fantasy world created by artists and engineers.

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

A bypass decorated with large wooden troll carvings.

A building so large that it has its own weather.

The 80-foot tire that looms over Michigan's I-94 was once a Ferris wheel in the New York World Fair.