This roadside monument commemorates the huge weapon built by an Ethiopian emperor's hostages.

A powerful tribute to the victims who suffered under Ethiopia's most devastating regime.

Spitalfields' regal market goat is said to be a monument to the area's migrant population but most are pretty sure it's just a goat.

Mary Kelly was last seen here before she was murdered by Jack the Ripper.

A mysterious pair of mice eating a piece of cheese is London's smallest public sculpture.

You'd never know the houses at 23-24 Leinster Gardens were fakes—until you see the train tracks on the other side.

Manhattan's deadly West Side railroad, which killed hundreds of New Yorkers, is remembered by this simple plaque.

This tiny, tranquil Senegalese island serves as a powerful symbol of the Atlantic slave trade.

Sip cherry liqueur at a bar dating back to 1840.

The scorched Lisbon church that survived two earthquakes and a massive fire.

A masterpiece of LGBT art has been restored in what may now be the most valuable restroom in America.

The first piece of public art dedicated to LGBT rights.

New York City's smallest piece of private property.

This monument to a veteran of the Mexican-American War is one of only two in Manhattan that serve as an actual mausoleum.

Try not to get slimed in Tribeca.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

Central America's deepest lake is actually a volcanic caldera, surrounded by three volcanoes.

The youngest volcano in Central America.

The crumbling remains of a once-grand building.

Housed in a 20th-century prison, this small museum recounts local Nicaraguan myths.

Guatemalan womanizer, venerated during Holy Week.

This mystical orb covered in strange symbols is thought to have been used in ancient Greek magical rituals.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

Legend says it was constructed with the destroyed pillar of an ancient Greek Temple.