The Great Fire of London and the regulation of one-way streets both started in this alley.

This charming, narrow-gauge railway in the Thames Estuary is sometimes referred to as the "Train to Nowhere."

This massive monument has been telling the time for 150 years—at a slight angle.

A medieval abbey featured on 'Game of Thrones' that dates back to the 12th-century.

The only monument to name all of the passengers and crew who died on the RMS Titanic.

A giant sculpture of the legendary "Salmon of Knowledge" celebrates the return of fish to Belfast's River Lagan.

A trail of "Game of Thrones"-themed doors carved from fallen trees from the iconic Dark Hedges.

A palatial former bank building now houses what may be the poshest art venue (and former Tesco) in Belfast.

The ruins of this medieval castle in Northern Ireland have inspired artists from C.S. Lewis to Led Zeppelin.

This short bridge is the only thing connecting a tiny Irish island to the mainland.

Northern Ireland's Brobdingnagian stepping stones.

The atmospheric road was never meant to be so creepy.

One part local history, 99 parts gruesome haunted house.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.