A statue in Budapest's Liberty Square honors the former U.S. president's efforts to end the Cold War.

A random tree outside a Budapest hotel has become a DIY shrine to the late singer.

This statue of a falling man commemorates a teenage martyr of the Hungarian Revolution.

Sitting beneath an unremarkable residential building is a museum devoted to classic Pinball.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

A late-night restaurant empire was launched from this humble storefront.

One of corporate America's best-kept secrets is also one of the most publicly displayed.

A grassroots community effort in the 1970s led to the creation of this beautiful garden full of delightfully whimsical exhibits.

3/4-scale model of the White House in Atlanta, Georgia.

A colorful square marks the heart of the city's LGBTQ community.

Scattered around Atlanta are little doors with big charm.

An underground magnet for ever-changing street art.

This ancient market is often referred to as the oldest shopping mall in the world.

Brass cobblestones mark the places where individual Holocaust victims were taken from their homes.

One of seven Jewish catacombs in Rome and one of only two open to the public.

Jesus' footprints and the first catacombs in the world.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

This demon atop the Notre-Dame de Paris looks utterly bored.

The celebrated eyesore created by starry-eyed sweethearts.

Claude Monet was baptized in this lavishly ornate Paris church.

A 400-year-old church covered floor to ceiling in ex-voto offerings from the faithful.

The industrial architecture honors the laborers who brought the Exposition Universelle of 1900 to life.

A popular shrine where the Blessed Virgin allegedly appeared in 1830, displaying a holy armchair and two incorruptible remains of Lady Saints.

The vast, legendary catacombs hold secrets much stranger than stacked bones.