The old observatory in Copenhagen has a spiral corridor used as a racetrack.

Art deco landmark on the outskirts of Washington, D.C.

One of the dwarven trees dates back to 1625 and survived the Hiroshima bombing.

A lovely aquatic park built by a one-armed Civil War veteran who made a fortune from lotuses.

In Little Caribbean, an ice-cream shop serves up regional flavors, including soursop, Irish moss, and "greatnut."

An astounding collection of medical specimens, including bits of President Lincoln.

A girls' boarding school inspired by the Chicago World's Fair, once abandoned, now restored to strange and scenic glory.

Austin’s local mountain isn’t really a mountain at all.

This simple frog painting created by musician Daniel Johnston embodies the spirit of Austin.

Turning night into day in Victorian-era Austin to thwart a serial killer.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

A free, canine-friendly alternative watering hole near the more famous Barton Springs.

To honor a beloved Austin radio DJ a neighborhood bridge has been covered in a loving mosaic.

Roadside Americana, fairy tale characters, and Austin quirkiness come together at this magical course in the heart of Texas' capital city.

Pink, packed sanctuary and home of the world's fullest-time Elvis fanatic.

This head-spinningly bizarre Depression-era art cave is wall-to-wall quartz and Jesus.

The bad-ass ride of a soul legend, housed in one of the world's few soul museums.

Every day a troupe of pampered water fowl walk the red carpet to their favorite fountain.

This opulent hotel has been visited by Spider-Man, Charlie's Angels, and the Ghostbusters.

A hidden gem on the lawn of the U.S. Capitol Building designed by landscape architect Frederick Law Olmsted.

The oldest continuously operating fish market in the United States.

It should come as no surprise that the best view of the Hollywood sign is from Batman's lair.

Resting place of Hollywood's immortals is also site of summer film screenings.

The legendary building that needed ghostly approval before being built.