There aren't too many operational funiculars around, but Pittsburgh has two!

A whimsical tower with a spiral staircase, inspired by the Space Age and the Möbius strip.

While most of the games in this arcade take quarters, that would have been a small fortune when they were made.

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

Largest magic museum in the United States with more than half a million pieces of memorabilia.

An Industrial Revolution-era public work that purified water using nothing but sand.

One man's homage to the orange as realized through a long-term folk art labor of love.

Outstanding collection of 19th century medical instruments includes a life-size figure cast from as many as 200 cadavers.

A little piece of Paris in the sultry south of the U.S.

Incredible miniature towns and buildings created and decorated with thousands of tiny rocks.

This Seattle store is packed with all sorts of curious creatures and creations.

This wall on a street corner in Lower Manhattan has been a blank canvas for a rotation of renowned artists since the 1980s.

There’s a hidden military meme engraved on the World War II Memorial.

The famous author's cottage hideaway.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

The inspiration for H.P. Lovecraft's horror stories and Batman's Arkham Asylum is now a condominium complex.

Once the central jail for Los Angeles, this building housed inmates like Al Capone, those arrested from the Zoot Suit and Watts Riots, and individuals imprisoned for their sexuality.

On the side of a remote mountain, a stone face bearing an inscription of mysterious origin.

A lavender labyrinth so large it’s visible on Google Earth.

This nine-story building can be played like an instrument.

This abandoned psychiatric hospital once housed more than 4,000 patients in the middle of a quaint New England town.

A brewery warehouse which doubles as a circus bigtop.

One man's swirling six-acre monument of stone.

You can still ride this 100-year-old work of art in Brooklyn's largest public park.