A tiny red pebble marks what may be the quietest outdoor spot in the United States.

There's a 12-foot-tall replica of the Washington Monument hidden under a manhole nearby.

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

One of New York's best collections of pinball is hidden in a secret bar in the back of this laundromat.

Enormous piles of historically significant stones, dumped by Congress in a forest, and abandoned for 60 years.

These eerie outliers of the lightning bug family glow a mysterious blue color.

One of only two commuter aerial tramways in the United States.

This upscale streetwear store is hidden behind a fake Snapple machine in the back of a deli.

New York City's smallest piece of private property.

A miniature rainforest is growing inside of a Midtown Manhattan office building.

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

One of the few working locomotive roundhouses in the United States.

Little did a museum know, they possessed the last-known lunch wagon in existence.

A sacred mountaintop temple offers a fine cup of tea to visitors who can survive the journey.

David Sedaris called it "The greatest shop in the world."

An abandoned stretch of elevated road in the middle of the Brazilian jungle.

It's not hard to see why the historic Peabody Conservatory of Music's library has been described as a "cathedral of books."

This centuries-old Italian chapel hangs midway down a sheer cliffside.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

Yemen's "Stone Palace" looks like it was carved right out of the tall stone column on which it is built.

A century-long search for a church that was never there.

This (occupied) house is 10 feet wide and full of spite.

This little blue house pokes out over the campus of UC San Diego, seven stories high.