Two churches shoot bottle rockets at each others' bell towers in an unusual Easter celebration.

The home of half the world's population of critically endangered mountain gorillas.

A 400-foot-tall tall map of Chicago makes this once-ignored building stand out.

Standing in a state of "arrested decay," this ghost town allows for a detailed peek into Gold Rush life in an unusually harsh climate.

Kay Andrews's recipe was so good, her family immortalized it in stone.

Head past the aisles of tropical fruit and imported candy at this bodega to discover a hidden, weekends-only taco stand.

Open since 1938, this diner has kept its fountain, malt machine, and all the gum that greasers left beneath its counter.

This 220-year-old house is a reminder of New York City's Dutch past.

Touching mementoes from those who didn't make it back from World War I still hang in one of New York's oldest bars.

A Ukrainian church canteen doles out hearty fare in an East Village basement.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

The hidden offices underneath Memorial Bridge have been locked up since 1976.

The pretty iron lamp is a reminder of the architecture underneath London's streets.

A total of 999 stairs lead visitors through a massive hole in a mountain known as the Gateway to Heaven.

Where an 11th-century flying monk crash landed after attempting to take to the skies.

Skeletons dressed in extravagant 18th century royal costumes cavort in the aisles of this German basilica.

Canyon walls shrouded in ferns.

The first park built over a freeway is a brutalist masterwork.

A swing to dangle you off the very edge.

As can be expected from a centuries old church built in a canal city, the undercroft of this house of worship is beautifully flooded.

A small island less than half a mile from Venice is a forbidden island with a dark and twisted past.

Trails through lava-carved tube-caves display sparkling bacteria and a rich history.

Not quite the menace it once was, this monster still has some chops.

The drama of nature in full effect in this Nevada State Park.