Question

arches are still visible today in ------ ------ built by the romans that are still standing.

Explanation:

The question is about identifying the structures (like aqueducts, buildings, etc.) built by Romans with visible arches today. Historically, Roman arches are prominent in structures like aqueducts, bridges, or buildings. The most common structures with Roman arches still standing are aqueducts (or other Roman architectural structures like the Colosseum, but aqueducts are a key example). However, the blank is to be filled with the type of structure. The typical answer here is "aqueducts" (or other Roman architectural works, but aqueducts are a primary example of Roman structures with arches still visible).

Answer:

aqueducts (or other valid Roman structures with arches like "buildings", "bridges", but "aqueducts" is a common and accurate answer for Roman arches still visible)