After a short-lived attempt to bring America in line with the rest of the world, this road was left in metric.

America's only nuclear missile silo open to the public.

An homage to everyone's favorite prehistoric cartoon family.

A reproduction of earth's many biomes.

Some of the tallest ancient American ruins continue to inspire awe and curiosity.

A geological mystery on Camelback Mountain.

Don't be fooled by this fake medieval facade even if it is almost 300 years old.

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

This picturesque horseshoe weir was first built in the 1600s to prevent flooding in the town of Bath.

This center tells the story of one of the most famous battles in Irish history.

Dublin's "Dead Zoo" serves as a window to Victorian museum design.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

Traveling this mountain pass reveals quaint stone buildings, stunning Irish scenery, and a bridge said to grant wishes.

The oldest pub in Ireland may also be the oldest surviving bar in the entire world.

The hotel where Martin Luther King Jr. was shot is now a museum dedicated to his work.

A series of waterfalls so massive they straddle the border of Argentina and Brazil.

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

This monolithic statue was erected in honor of Chief Black Hawk (even if it wasn't made to look like him).

Despite its name, this fast food museum is actually a replica of the ninth McDonald's store.

The palatial McDonald's that inspired Wesley Willis.

Half-sized replica of the Leaning Tower of Pisa built to honor Galileo.

The unluckiest U-boat in the entire German fleet is now on display in a Chicago museum.

This $3 million model train takes you through Chicago, Seattle, and the thousands of miles in between.

This historic hotel invented the chocolate brownie.