One of the oldest family businesses in Reykjavík serves lamb-based hot dogs.

This stunning concert hall has become a symbol of Iceland's national recovery.

A relatively obscure antihero from the Marvel Comics universe adorns a wall inside Iceland's main airport.

This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

This tiny museum's sizable collection is jammed into a former underground public toilet.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

An encyclopedic collection of mammal penises.

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

Stockholm's deepest subway station is also a stunning ecological wonder.

Sound travels strangely in this underground whispering gallery.

Stockholm's narrowest alley is barely over two feet wide.

Sweden's "good old days" painstakingly re-created in a model village.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

Iconic red and white plaques show the creative names invented to navigate the city streets.

This spectacular public market has got meat, fish, vegetables, baked goods, and enough kielbasa for a lifetime.

A collection of Witchcraft artifacts and occult paraphernalia started by the leader of the Long Island Coven.

One of the largest trees of its kind in California.

The world's largest outdoor organ is played weekly by one of just two civic organists in the U.S.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

World-famous, Pink's still manages to keep its prized cult fetish status.

Scores of vintage street lamps shine along L.A.’s Miracle Mile.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

Since 1973, this block has been home to the most concentrated collection of murals in San Francisco.