One of Europe's oldest libraries.

A theatre built to house the rowdy Oxford graduation ceremonies became the stage for a debate about God's existence.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

The most loyal of little dogs, or a Victorian era publicity stunt?

A six-ton wedding present for the King of the Scots.

The final resting place of soldiers' loyal canine companions.

One of the oldest scientific gardens in Britain, containing more than 13,302 plant species in its core collection.

Largest lake in Great Britain measured by surface area.

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

A second generation sun-powered marvel lights up the night.

A sign at the end of the Santa Monica Pier marks the traditional end of the legendary American highway.

An abandoned Jazz Age dream home and con man's hideout in Death Valley.

Marta Becket's hand-painted theater in the desert.

A geological mystery on Camelback Mountain.

A spiritual vortex among the red rocks in Sedona.

This rugged area of red rocks and arches is often considered one of the most beautiful places on Earth.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

One of the smallest towns in the United States.

The first declared National Monument in the United States.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

His music once banned in Communist Cuba, John Lennon is now immortalized in bronze by Castro, who considers Lennon a "fellow dreamer."

The sci-fi villain is a little-known inhabitant of the U.S. capital's largest cathedral.

Huge masonic hall in Philadelphia with lavishly themed rooms.