Crossword clues for What's under an arch 4 letters:ARCHDecorative doorwayARCHImpishARCHPedal featureARCHShoe insertARCHStructure with a keystoneARCHCheekyARCHWalk-through monumentARCHGateway, for oneARCHPlayfully trickyARCHKeystone settingARCHClever in a bent way?ARCHCraftyARCHSymbol of St. LouisARCHDecorative entranceARCHTongue-in-cheekARCHLandmark of 6 DownARCHMarvel of masonryARCHSole supportARCHPeace ___ (B.C./Washington State border crossing landmark)ARCHCurved constructionARCH___ of Titus (entryway to Palatine Hill)ARCHAqueduct featureARCHGateway structureARCHSt. Louis sightARCHEyebrow shapeARCHFoot featureARCHFoot partARCHKeystone's spotARCHWashington Square Park featureARCHSt. Louis gatewayARCHSt. Louis landmarkARCHFoot curvatureARCHSole featureARCHPodiatrist's concernARCHEyebrow, oftenARCHKeystone siteARCHSt. Louis monument to American expansionARCHCock, as an eyebrowARCHEero Saarinen's Gateway __ARCHPreeminentARCHPeace ___ (B.C./Washington State border crossing)ARCHSupport site?ARCHSee 67-AcrossARCHCunningARCHCurved entrywayARCHFlatfoot's lackARCHPlace for a keystoneARCHSt. Louis attractionARCHSt. Louis symbolARCHPrefix with nemesis