This historic hotel invented the chocolate brownie.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

Stripes of flowers bloom each spring in a 50 acre rainbow of color.

Traversing these canyons, visitors can take in stunning views and glimpses of the region's history.

Instead of faces, these sculptures have barcodes—statements on societal dehumanization.

Every year, festive decorations appear on this juniper tree located in the median strip of a busy highway.

This church on a Tohono O'Odham reservation has stood since 1797.

Originally conceived as part of a proposed Arizona State Capitol building in the 1950s, this structure built in 2004 stands as a monument to the architect's legacy.

These elusive, isolated rodents evolved into a distinct, locally iconic subspecies.

The world's only teal arches exist in a city that cares more about its aesthetic than an Instagram influencer.

The massive, incredibly rare instrument is over 11 feet tall with a range so deep it goes lower than humans can hear.

Sleep where gangsters fell amidst smoke and flame, with nary a bullethole to show for the legendary struggle.

The first permanent memorial to a unique secret weapon of World War II.

Take a monster truck tour around an ostrich farm in the middle of the desert.

A geological mystery on Camelback Mountain.

Legend says train robbers stashed their gold within the depths of this unusual cave.

The highest point in Arizona is an oddly snow-topped peak within the otherwise arid state.

The eroded core of an ancient volcano is now accessible by a short hike.

A Wild West jailhouse that slid down the mountainside.

This collection of Wild West movie memorabilia also claims to hold some secrets of the Lost Dutchman's mine.

A mysterious "wedding cake" castle in the middle of the urban desert.

These free-roaming horses were once destined to disappear from the land.

This 40-room dwelling tucked within a cliff was built by the basin's prehistoric residents.

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.