Imagine being in a new city with a few hours to kill, but no idea what to do. Headout is a travel app that enables tourists to book outings at very short notice, in most cases on the same day. The startup announced today that it’s raised a $10 million Series A led by returning investors Nexus Venture Partners and Version One Ventures to support its ambitious growth targets.

Over the next 18 months, co-founder and CEO Varun Khona says the startup wants to expand from 20 cities to 100 cities in North America, Europe and the Asia-Pacific. The app recently added French, German and Spanish in select markets and aims to have all of its inventory available in 12 languages by the end of next year. Its bookings includes sightseeing tours, museum tickets and shows.

Headout’s Series A brings its total raised to $12 million. Its seed round was announced in 2015, when TechCrunch first profiled the company. The startup claims it has grown eight times over the past 12 months and is profitable.

As it enters new markets, however, Headout will be up against a roster of competitors that also offer experience bookings for tourists. These include Klook, TripAdvisor-owned Viator, Get Your Guide and Airbnb’s Experiences feature.

Khona says Headout’s main edge is tailoring its inventory and technology platform for “spontaneous last-minute mobile use cases.” It’s also a managed marketplace, meaning it standardizes pricing and quality, with the hope of creating a consistent experience across all outings. The startup says this focus on combining quality with unit economics means it’s enabled customers to save an average of 18% on last-minute bookings.