Huge masonic hall in Philadelphia with lavishly themed rooms.

Old neon signs from the City of Brotherly Love provide a snapshot of the city’s evolution.

A daily replay of the experiment that proved the rotation of the Earth.

A tour de force of a fountain, memorializing a man who loved fountains more than anything else.

South Philadelphia is home to Keith Haring's only surviving in situ collaborative public mural.

In the early 1800s, surgery was also a show.

The fastest transatlantic ocean liner sat abandoned in a Philadelphia shipyard for decades.

The largest university building in the West is a gothic masterpiece containing dozens of theme rooms based on different countries.

A museum dedicated to the history & joys of the trail & your best chance to see hikers throwing up ice cream.

Exact replica of the ancient monument, but much, much lighter.

Time-frozen department store of dangerous and dusty relics.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

The largest collection of model trains in the world is actually run using full-size locomotive technology.

Closed for decades, this strange symbol of Japan's Expo '70 has finally opened its psychedelic insides to the public.

More than 5,000 contemporary and "historic" mustards from around the world.

Nonprofit art center that promotes outsider, intuitive, and self-taught art.

The only Bahá'í house of worship in North America and one of only a handful worldwide.

9,000 square feet of vintage and modern mechanical toys, dioramas & sideshow curiosities.

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

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

Giant Redwood-themed cafeteria operates under the golden rule, "Dine Free Unless Delighted."

This bright yellow relic is the final survivor of a short burst of seashell-shaped petrol pumps.

A living archive of urban activism and space reclaimed.

Walk through depictions of the torture inflicted on those who go to Buddhist hell.