A 1,215-foot tunnel transports pedestrians beneath the River Thames.

One part local history, 99 parts gruesome haunted house.

Several plaster noses are hidden in plain sight around London's Soho neighborhood.

The quaint little store that is said to have inspired a famous Dickens novel was only given its name after the book was released.

A charming 17th-century alley is lined with secondhand bookstores and antiquarian shops.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

Named for the Yoruba word for Lagos, this craft brewery draws on European beer-making and West African palm wine-fermenting techniques.

This Ocean Drive crosswalk has been paved in rainbow colors to honor the LGBTQ+ community and the man who brought pastel to Miami Beach.

This post-war motel embodies a little-known, Miami-born architectural style.

Medicinal spa created from the mineral-rich runoff of a geothermal power plant

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

A stunning architectural yet functional feat, towering over Oslo.

This roadside attraction looks like a flying saucer parked atop the tundra.

This functioning parish church is also the site of many concert performances due to its wonderful acoustics.

World's strongest whirlpool.

An artist's mausoleum with a haunting echo.

One of the most breathtaking railways in Europe also takes one of the steepest climbs, from fjord to mountain plateau.

This ducal residence was once home to a future Russian empress and a French king in exile.

This celebration of Latvia’s freedom and independence avoided demolition over half a century of Soviet occupation.

This charming Latvian lane doubled as Baker Street on the Soviet Union’s version of Sherlock Holmes.

The reconstruction of this prominent building fulfilled a long-written command.

These crumbling Latvian forts make for some haunting seaside ruins.

A black cat protests the City Guild in Riga's Old Town.