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

The second building of its name to occupy this location might be the finest flatiron building in San Francisco.

Priceless space junk on display in front of a local Dairy Queen.

This Niagara Falls tourist trap is a world bright with neon and curiosities that will inspire love, hate, or a mixture of both.

The land is home to swimming ponies and a legendary 18th-century treasure.

By day this New Orleans square is for pedestrians, but by night it is a kingdom of kittens.

This "second" cemetery represents New Orleans' attempt to keep cholera at bay.

This working class sculpture pounds his hammer all the livelong day.

An old-timey peepshow allows visitors to gawk at some of the world's most freakishly large footwear.

A wall of chewing gum moonlights as collective art.

A giant Troll lurks under one of Seattle's oldest bridges.

A museum dedicated to the history and exploration of both popular music and science fiction.

This historic Victorian hotel has a scandalous history of affairs and murder.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

A monument celebrating the idea of reaching inaccessible places.

This staircase in a lush tropical grotto was built by enslaved laborers and renamed to honor Queen Victoria's role in ending slavery in the British Empire.

Legend tells how a Spanish soldier disappeared from this isolated sentry box without a trace.

This bleach-white graveyard overlooking the ocean is accessed through a tunnel.

This tree is a living witness to the beginning of the Civil Rights Movement.

The walls of the iconic dome are hollow and have a secret stairway.

A super-sized promotional trick that is now a D.C. landmark.

Rumor has it the uncarved lump behind the three famous suffragists is reserved for the first woman president.

The 72-foot giant escaped confinement in a large patch of mulch only to be reburied in the sandy shores of the Potomac River.

A muscular Art Deco monument represents the struggle between regulators and unbridled markets.